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1.
Seung Man Eom Bum Suk Kim Hong Hee Yoo 《Journal of Mechanical Science and Technology》2008,22(11):2163-2170
A general multi-body formulation to analyze the tolerance effects on the statistical property variations of natural frequencies
of multi-body systems undergoing constant rotational motion is proposed in this paper. To obtain the tolerance effects, Monte-Carlo
simulation method is conventionally employed. However, the Monte-Carlo simulation has serious drawbacks; spending too much
computation time for the simulation and achieving very slow convergence around some dynamically unstable regions. To resolve
such problems, a method employing analytical sensitivity information is suggested in this paper. To obtain the sensitivities
of natural frequencies the eigenvalue problem should be differentiated with respect to a design variable. The sensitivities
of mass and stiffness matrices should be calculated at the dynamic equilibrium. By employing the sensitivities of natural
frequencies along with the tolerance of the design variable, the statistical property variations of the natural frequencies
can be calculated.
This paper was recommended for publication in revised form by Associate Editor Seockhyun Kim
Seung Man Eom graduated from the Department of Mechanical Engineering at Incheon University in 2005 and received his master degree from
the Department of Mechanical Engineering at Hanyang University in 2007. He is currently working as a Researcher of Aircraft
Development Team in KIAT(Korea Institute of Aerospace Technology, Koreanair), DaejeonDeajeon, Korea.
Bum Suk Kim graduated from the School of Mechanical Engineering at Hanyang University in 2006 and received his master degree from the
same department in 2008. He is currently working as a Ph.D. student in the School of Mechanical Engineering in Hanyang University,
Seoul, Korea.
Hong Hee Yoo graduated from the Department of Mechanical Design and Production Engineering at Seoul National University in 1980 and received
his master degree from the same department in 1982. He received his Ph.D. degree in 1989 from the Department of Mechanical
Engineering and Applied Mechanics in the University of Michigan at Ann Arbor, U.S.A. He is currently working as a professor
in the School of Mechanical Engineering in Hanyang University, Seoul, Korea. 相似文献
2.
Jong Won Choi Mo Se Kim Jeong-Seob Shin Sai-Kee Oh Baik-Young Chung Min Soo Kim 《Journal of Mechanical Science and Technology》2009,23(7):1858-1865
In HVAC system, the oil circulation is inevitable because the compressor requires the oil for lubrication and sealing. A small
portion of the oil circulates with the refrigerant flow through the system components while most of the oil stays or goes
back to the compressor. Because oil retention in refrigeration systems can affect system performance and compressor reliability,
proper oil management is necessary in order to improve the compressor reliability and increase the overall efficiency of the
system. This paper describes a numerical analysis of oil distribution in each component of the commercial air conditioning
system including the suction line, discharge line and heat exchanger. In this study, system modeling was conducted for a compressor,
discharge line, condenser, expansion valve, evaporator and suction line. Oil separation characteristics of the compressor
were taken from the information provided by manufacturer. The working fluid in the system was a mixture of a R-410A refrigerant
and PVE oil. When the oil mass fraction (OMF) was assumed, oil mass distribution in each component was obtained under various
conditions. The total oil hold-up was also investigated, and the suction line contained the largest oil hold-up per unit length
of all components.
This paper was presented at the 7th JSME-KSME Thermal and Fluids Engineering Conference, Sapporo, Japan, October 2008.
Min Soo Kim received his B.S., M.S., and Ph.D. degree at Seoul National University, Korea in 1985, 1987, and 1991, respectively. After
Ph.D. degree, Prof. Kim worked at National Institute of Standards and Technology (NIST) in U.S.A. for about three years. He
is currently a professor at the School of Mechanical and Aerospace Engineering of Seoul National University, Korea.
Jong Won Choi received B.S. degree in Mechanical Engineering from Korea University in Seoul, Korea, in 2004, and then received M.S. degrees
from Seoul National University in 2006. He is currently a student in Ph.D. course at the School of Mechanical and Aerospace
Engineering of Seoul National University in Seoul, Korea. His research interests include refrigeration system, micro-fluidic
devices, and PEM fuel cell as an alternative energy for next generation.
Mo Se Kim received B.S. degree in Mechanical and Aerospace Engineering from Seoul National University in Seoul, Korea, in 2007. He
is currently a student in M.S. course at the School of Mechanical and Aerospace Engineering of Seoul National University in
Seoul, Korea. He had studied on the oil migration in the heat pump system, and now he studies on the refrigeration system
using an ejector.
Baik-Young Chung received his B.S., M.S., and Ph.D. degrees in Mechanical Engineering from Inha University, Korea in 1984, 1986, and 2001,
respectively. He is currently a research fellow of HAC Research Center at LG Electronics. He is responsible for the commercial
air conditioner group.
Sai-Kee Oh received B.S. degree in Mechanical Engineering from Seoul National University, Korea in 1989, and then received M.S. and
Ph.D. degrees from KAIST, Korea in 1991 and 1997, respectively. He is currently a principal research engineer of HAC Research
Center at LG Electronics. He is responsible for the residential air conditioner group.
Jeong-Seob Shin received B.S. degree in Machine Design and Production Engineering from Hanyang University, Korea in 1988, M.S. degree in
Mechanical Engineering from KAIST, Korea in 1991, and Ph.D. degree in Mechanical Engineering from POSTECH, Korea in 2004.
He has joined HAC Research Center at LG Electronics since 2006 as a principal research engineer. 相似文献
3.
Lean premixed combustion is a well known method in gas turbine combustors that can reduce fuel consumption and decrease flame
temperature. In lean premixed flames, flame instabilities can occur because the combustion takes place near the lean flammable
limit. For the purpose of increasing flame stability, a small amount of hydrogen was added into a fuel, which has ultra low
lean flammable limit. The extinction stretch rate increased and total equivalence ratio at extinction decreased with hydrogen
addition; consequently, ultra lean premixed combustion was possible and flame stability could be achieved at low temperature
conditions. The NOx emission increased with hydrogen addition for the same stretch rate and equivalence ratio, but the extinction stretch rate
and lean flammability limit was enlarged. Consequently, NOx emission decreased with hydrogen addition in the near extinction conditions. Hydrogen addition could improve flame stability
and reduce NOx emission in ultra lean premixed combustion.
This paper was recommended for publication in revised form by Associate Editor Ohchae Kwon
Dr. Eun-Seong Cho received his B.S. and M.S. degrees in Mechanical Engineering from Hanyang University, Korea, in 1996 and 1998, respectively.
He then received his Ph.D. degree from Seoul National University, Korea, in 2005. He was a principal engineer of KD Navien
research center and currently a research associate at Delft University of Technology, The Netherlands. His research interests
include eco-friendly clean combustion technology, new and renewable energy systems.
Prof. Suk Ho Chung received his B.S. degree from Seoul National University, Korea, in 1976 and Ph.D. degree in Mechanical Engineering from Northwestern
University, USA, in 1983. He is a Professor since 1984 in the School of Mechanical and Aerospace Engineering at Seoul National
University in Seoul, Korea. His research interests cover combustion fundamentals, pollutant formation, laser diagnostics,
and plasma-assisted combustion. 相似文献
4.
Jeonghoon Yoo Myung Wook Hyun Jun Ho Choi Sungchul Kang Seung-Jong Kim 《Journal of Mechanical Science and Technology》2009,23(8):2236-2243
The response surface method combined with the design of experiment-based design optimization of a variable stiffness joint
(VSJ) is presented in this article. A VSJ used in a manipulator of a robot arm to support 1 kg payload at the end is designed
by considering the minimization of the total weight as the objective function. Owing to the requirement of large rotational
stiffness of the VSJ, over 10 N · m, ring-type permanent magnets are adopted. First, a model composed of two permanent magnets was initially manufactured and
tested for comparison with the analysis results. Then, a three-ring-type permanent magnet-based model is suggested and optimized
to increase the torque of VSJ. The finite element method is used as a magnetic field analysis method to substitute for the
expensive experimental process. Optimization results decrease the weight from 0.899 kg to 0.538 kg, still satisfying the requirement
for the rotational stiffness.
This paper was recommended for publication in revised form by Associate Editor Tae Hee Lee
Jeonghoon Yoo received his B.S. and M.S. degrees in Mechanical Design and Production Engineering from Seoul National University, in 1989
and 1991, respectively. He then received his Ph.D. degrees from the University of Michigan, Ann Arbor, in 1999. Dr. Yoo is
currently a Professor at the School of Mechanical Engineering at Yonsei University in Seoul, Korea. Dr. Yoo’s research interests
include analysis and design of electromagnetic field systems.
Myung Wook Hyun received his B.S. and M.S. degrees in Mechanical Engineering from Yonsei University, Korea, in 1995 and 1997, respectively.
While studying for his M.S. degree, Mr. Hyun also studied variable stiffness unit design. He is now working at Samsung Electronics,
Co. Ltd..
Jun Ho Choi received his B.S. and M.S. degrees in Mechanical Design from Hanyang University, Korea and his Ph.D. degree from the University
of Michigan, Ann Arbor. He is currently a senior research scientist in the Korea Institute of Science and Technology. His
research interests include nonlinear control, manipulator control, and safe-joint design.
Sungchul Kang received his B.S., M.S., and Ph.D. degrees in Mechanical Design and Production Engineering from Seoul National University,
Korea, in 1989, 1991, and 1998 respectively. Dr. Kang is currently a Principal Research Scientist in the Center for Cognitive
Robotics Research, Korea Institute of Science and Technology, in Seoul, Korea. Dr. Kang’s research interests include mobility
and manipulation of field and service robots and haptics.
Seung-Jong Kim received his B.S. degree in Mechanical Engineering from Seoul University, Korea, in 1989, and his M.S. and Ph.D. degrees
from KAIST in 1991 and 1998, respectively. Dr. Kim is currently a Principal Research Scientist at the Korea Institute of Science
and Technology in Seoul, Korea. Dr. Kim’s research interests include the design, control, and dynamic analysis of mechatronic
systems. 相似文献
5.
The control of nitrogen oxides (NOx) has been a major issue in designing combustion systems, since NOx play a key role in ozone depletion and the generation of photochemical smog. The characteristics of NOx emission can be essential information for the development of a clean combustor having suitable reduction methodologies. In
the present study, NOx emission characteristics were evaluated numerically, accounting for the effect of equivalence ratio, stretch rate, pressure,
and initial temperature. In general, peak NOx emission appeared near the equivalence ratio of unity case, and NOx emission increased with pressure and initial temperature due to the temperature sensitivity in NOx mechanism. NOx decreased with stretch rate due to the decrease in residence time in high temperature region. Furthermore, the thermal and
prompt mechanisms were evaluated with equivalence ratio for two calculation methods. The conventional methods ignore the interaction
of coupled mechanism of thermal and prompt NOx. The reaction path diagram was introduced to understand effective reaction pathways in various conditions.
This paper was recommended for publication in revised form by Associate Editor Kyoung Doug Min
Dr. Eun-Seong Cho received his B.S. and M.S. degrees in Mechanical Engineering from Hanyang University, Korea, in 1996 and 1998, respectively.
He then received his Ph.D. degree from Seoul National University, Korea, in 2005. He was a principal engineer of KD Navien
research center and currently a research associate at Delft University of Technology, The Netherlands. His research interests
include eco-friendly clean combustion technology, new and renewable energy systems.
Prof. Suk Ho Chung received his B.S. degree from Seoul National University, Korea, in 1976 and Ph.D. degree in Mechanical Engineering from Northwestern
University, USA, in 1983. He is a Professor since 1984 in the School of Mechanical and Aerospace Engineering at Seoul National
University in Seoul, Korea. His research interests cover combustion fundamentals, pollutant formation, laser diagnostics,
and plasma-assisted combustion. 相似文献
6.
A modeling method for the modal analysis of a multi-blade system undergoing rotational motion is presented in this paper.
Blades are assumed as cantilever beams and the coupling stiffness which originates from the shroud flexibility is considered
for the modeling. To obtain general conclusions from the numerical results, the equations of motion are transformed into a
dimensionless form. Dimensionless parameters related to the angular speed, the hub radius, and the coupling stiffness are
identified and the effects of the parameters on the modal characteristics of the system are investigated. It is shown that
the coupling stiffness especially plays an important role to change the modal characteristics of the system. The range of
critical angular speed is also obtained through the numerical analysis.
This paper was recommended for publication in revised form by Associate Editor Seockhyun Kim
Ha Seong Lim graduated from Department of Mechanical Engineering at Hanyang University in 2006 and received his Master’s degree in 2008.
He is currently a technical engineer in STX Offshore & Shipbuilding Company, Seoul, Korea.
Hong Hee Yoo graduated from the Department of Mechanical Design and Production Engineering at Seoul National University in 1980 and received
his Master’s degree from the same department in 1982. He received his Ph.D. degree in 1989 from the Department of Mechanical
Engineering and Applied Mechanics at the University of Michigan at Ann Arbor, U.S.A. He is currently a professor in the School
of Mechanical Engineering in Hanyang University, Seoul, Korea. 相似文献
7.
Zhen-Zhe Li Kwang-Su Heo Dong-Ji Xuan Seoung-Yun Seol 《Journal of Mechanical Science and Technology》2009,23(3):607-613
Thermoforming is one of the most versatile and economical processes available for polymer products, but cycle time and production
cost must be continuously reduced in order to improve the competitive power of products. In this study, water spray cooling
was simulated to apply to a cooling system instead of compressed air cooling in order to shorten the cycle time and reduce
the cost of compressed air used in the cooling process. At first, cooling time using compressed air was predicted in order
to check the state of mass production. In the following step, the ratio of removed energy by air cooling or water spray cooling
among the total removed energy was found by using 1-D analysis code of the cooling system under the condition of checking
the possibility of conversion from 2-D to 1-D problem. The analysis results using water spray cooling show that cycle time
can be reduced because of high cooling efficiency of water spray, and cost of production caused by using compressed air can
be reduced by decreasing the amount of the used compressed air. The 1-D analysis code can be widely used in the design of
a thermoforming cooling system, and parameters of the thermoforming process can be modified based on the recommended data
suitable for a cooling system of thermoforming.
This paper was recommended for publication in revised form by Associate Editor Dongsik Kim
Zhen-Zhe Li received his B.S. degree in Mechanical Engineering from Yanbian University, China, in 2002. He then received his M.S. degree
in Aerospace Engineering from Konkuk University, South Korea, in 2005. He then received his Ph.D. degree in Mechanical Engineering
from Chonnam National University, South Korea, in 2009. Dr. Li is currently a Researcher of the Department of Mechanical Engineering,
Chonnam National University, South Korea. Dr. Li’s research interests include applied heat transfer, fluid mechanics and optimal
design of thermal and fluid systems.
Kwang-Su Heo received his B.S. degree in Mechanical Engineering from Chonnam National University, South Korea, in 1998. He then received
his M.S. and Ph.D. degrees in Mechanical Engineering from Chonnam National University, South Korea, in 2003 and 2008, respectively.
Dr. Heo is currently a Post-doctorial Researcher of the Department of Mechanical Engineering, KAIST(Korean Advanced Institute
of Science and Technology), South Korea. Dr. Heo’s research interests include applied heat transfer, fluid mechanics and thermal
analysis of superconductor.
Dong-Ji Xuan received his B.S. degree in Mechanical Engineering from Harbin Engineering University, China, in 2000. He then received his
M.S. degree in Mechanical Engineering from Chonnam National University, South Korea, in 2006. He is currently a Ph.D. candidate
of the Department of Mechanical Engineering, Chonnam National University, South Korea. His research interests include control
& optimization of PEM fuel cell system, dynamics & control, mechatronics.
Seoung-Yun Seol received his B.S. degree in Mechanical Design from Seoul National University, South Korea, in 1983. He then received his
M.S. degree in Mechanical Engineering from KAIST(Korean Advanced Institute of Science and Technology), South Korea, in 1985.
He then received his Ph.D. degree in Mechanical Engineering from Texas Tech University, USA, in 1993. Dr. Seol is currently
a Professor of the School of Mechanical and Systems Engineering, Chonnam National University, South Korea. Dr. Seol’s research
interests include applied heat transfer, fluid mechanics and thermal analysis of superconductor. 相似文献
8.
Seung-chai Jung Byung-Hoon Park Hyun Ko Woong-sup Yoon 《Journal of Mechanical Science and Technology》2009,23(3):823-835
Effects of the bulk inlet velocity on the characteristics of dual-inlet side-dump flows are numerically investigated. Non-reacting
subsonic turbulent flow is solved by a preconditioned Reynolds-averaged Navier-Stokes equation system with low-Reynolds number
k − ɛ turbulence model. The numerical method is properly validated with measured velocity distributions in the head dome and the
combustor. With substantial increase in the bulk inlet velocity, general profiles of essential primary and secondary flows
normalized by the bulk inlet velocity are quantitatively invariant to the changes in the bulk inlet velocity.
This paper was recommended for publication in revised form by Associate Editor Do Hyung Lee
Seung-chai Jung received his B.S. degree in Mechanical Engineering from Yonsei University, Korea, in 2001. He then received his M.S. degree
in Mechanical Engineering from Yonsei University, Korea, in 2005. Mr. Jung is currently a Ph. D. candidate at Yonsei University,
where he is majoring in Mechanical Engineering. Mr. Jung’s research interests include propulsion system and particle-surface
collision dynamics.
Byung-Hoon Park received his B.S. degree in Mechanical Design and Production Engineering from Yonsei University in 2003. He is currently
a Ph.D. candidate in Yonsei University in Seoul, Korea. His research interests include performance design of propulsion systems
and nu-merical analysis of instability in multiphase turbulent reacting flow-fields.
Hyun Ko received his B.S. degree in Aerospace Engineering from Chonbuk National University, Korea, in 1996. He then received his
M.S. degree in Mechanical Design from Chonbuk National University, Korea, in 1998. In 2005, he obtained his Ph.D. degree from
Yonsei University, where he majored in mechanical engineering. Dr. Ko is currently a Principal Research Engineer of the MicroFriend
Co., Ltd. in Seoul, Korea. His research interests include propulsion related systems and computational fluid dynamics.
Woong-sup Yoon received his B.S. degree in Mechanical Engineering from Yonsei University, Korea, in 1985. He then received his M.S. degree
from University of Missouri-Rolla in 1989. In 1992, he obtained his Ph.D. degree from the University of Alabama in Huntsville,
where he majored in mechanical and aerospace engineering. Dr. Yoon is currently a professor at the School of Mechanical Engineering
at Yonsei University in Seoul, Korea. His research interests include propulsion system and particle-related environmental/
thermal engineering. 相似文献
9.
Kyoung Chun Yang Seong Hyuk Lee Jong-Min Kim Young Ki Choi Dave F. Farson Young Eui Shin 《Journal of Mechanical Science and Technology》2009,23(2):435-441
The interfacial reaction between Cu pad coated with Au/Ni and solder bump of flip chip package, using Sn97.5wt.%-Ag2.5wt%,
was studied under thermal shock stress. All joints were subjected to thermal shock test with −65°C/+150°C temperature range.
For the Sn-2.5Ag solder, a scallop-like (Cu,Ni)6Sn5 intermetallic compound was formed in the solder matrix after 20 cycles of thermal shock. (Cu,Ni)6Sn5 was detached from the interface as (Ni,Cu)3Sn4 grew underneath the (Cu,Ni)6Sn5 IMC(Intermetallic Compound), whereas the elements of Sn, Ni and Cu were moved by interdiffusion at the interface between
solder alloy and Cu pad. The composition of the IMCs in the solder joints and elemental distribution across the joint interfaces
were quantitatively measured with EPMA (electron probe micro analysis). Finally, it was found that the crack initiation point
and its propagation path could be influenced by the thermal shock conditions, two underfills, and their properties.
This paper was recommended for publication in revised form by Associate Editor Chongdu Cho
Kyoung Chun Yang received his B.E. and M.E. degrees in Mechanical Engineering from Chung-Ang University, Korea, in 2006 and 2008, respectively.
His research interests include reliability in electronic packages, micro joints evaluation, advanced IC packaging/assembly
technologies.
Seong Hyuk Lee received his Ph. D. degree in Mechanical Engineering from Chung-Ang University, Korea, in 1999. Dr. Lee is currently an Associate
Professor at the School of Mechanical Engineering of Chung-Ang University in Seoul, Korea. His research interests are mainly
in the micro/nanoscale energy conversion and transport, the computational physics associated with thin film optics, and thermal
and fluid engineering.
Jong-Min Kim received his B.E. and M.E. degrees in Mechanical Engineering from Chung-Ang University, Korea, in 1997 and 1999, respectively.
He then received his Ph.D. degree in Manufacturing Science from Osaka University, Japan, in 2002. Dr. Kim is currently an
Associate Professor at the School of Mechanical Engineering at Chung-Ang University in Seoul, Korea. He has been mainly engaged
in the fields of the interconnection & packaging technology in microelectronics and the intelligent assembly process in micro/nano
systems.
Young Ki Choi received his B.E. and M.E. degrees in Mechanical Engineering from Seoul National University, Korea, in 1978 and 1980, respectively.
He then received his Ph.D. degree in Manufacturing Science from Univ. of California, Berkeley, U.S.A., in 1986. Dr. Choi is
currently a Professor at the School of Mechanical Engineering at Chung-Ang University in Seoul, Korea. He has been mainly
engaged in the fields of the heat transfer in micro-nano systems and the numerical analysis of the heat transfer system.
Dave F. Farson received B.S. and M.S. degrees in Welding Engineering and Ph.D. degree in Electrical Engineering from The Ohio State University
in 1987. He worked at Westinghouse R&D and Applied Research Laboratory at Penn State University before returning Ohio State
University in 1995, where he is currently an Associate Professor in the Department of Integrated Systems Engineering. He is
a past-president and Fellow of the Laser Institute of America and was co-editor of its Handbook of Laser Materials Processing.
He is also active in the American Welding Society. He does research in laser materials processes and materials joining for
a range of applications including biomedical and electronics device fabrication.
Young Eui Shin received his B.E.degree Mechanical Engineering from Chung-Ang University in Korea, and M.S and Ph.D degrees from Nihon Univ.
and Osaka Univ. in 1985 and 1992 respectively. He worked as principal researcher in the Technical central lab of Daewoo Heavy
industry from 1985 to 1988, and as a chief researcher in Technical Center of Samsung Electronics from 1992 to 1994. At present,
he is a Professor at the School of Mechanical Engineering, Chung-Ang Univ., in Korea. He is also working as President, Korea
Micro Joining Association. He has been mainly engaged in eco friendly materials application for micro system packaging and
reliability evaluation for micro joints. 相似文献
10.
Dongji Xuan Zhenzhe Li Jinwan Kim Youngbae Kim 《Journal of Mechanical Science and Technology》2009,23(3):717-728
The output power efficiency of the fuel cell system mainly depends on the required current, stack temperature, air excess
ratio, hydrogen excess ratio, and inlet air humidity. Therefore, the operating conditions should be optimized to get maximum
output power efficiency. In this paper, a dynamic model for the fuel cell stack was developed, which is comprised of a mass
flow model, a gas diffusion layer model, a membrane hydration, and a stack voltage model. Experiments have been performed
to calibrate the dynamic Polymer Electrolyte Membrane Fuel Cell (PEMFC) stack model. To achieve the maximum output power and
the minimum use of hydrogen in a certain power condition, optimization was carried out using Response Surface Methodology
(RSM) based on the proposed PEMFC stack model. Using the developed method, optimal operating conditions can be effectively
selected in order to obtain minimum hydrogen consumption.
This paper was recommended for publication in revised form by Associate Editor Tong Seop Kim
Dong-Ji Xuan received his B.S. degree in Mechanical Engineering from Harbin Engineering University, China in 2000. He then received his
M.S. degree in Mechanical Engineering from Chonnam National University, South Korea in 2006. Currently, he is a Ph.D. candidate
of the Department of Mechanical Engineering, Chonnam National University, South Korea. His research interests include control
and optimization of PEM fuel cell system, dynamics and control, and mechatronics.
Zhen-Zhe Li received his B.S. degree in Mechanical Engineering from Yanbian University, China in 2002. He then received his M.S. degree
in Aerospace Engineering from Konkuk University, South Korea in 2005 and his Ph.D. degree in Mechanical Engineering from Chonnam
National University, South Korea in 2009. Dr. Li is currently a Researcher of the Department of Mechanical Engineering in
Chonnam National University, South Korea. Dr. Li’s research interests include applied heat transfer, fluid mechanics, and
optimal design of thermal and fluid systems.
Jin-Wan Kim received his B.S. degree in Aerospace Engineering from Chosun University, South Korea in 1990. He then received his M.S.
degree in Aerospace and Mechanical Engineering from Korea Aerospace University, South Korea in 2003 and his Ph.D degree in
Mechanical Engineering from Chonnam National University, South Korea in 2008. He is currently a Post Doctor of the Department
of Mechanical Engineering in Chonnam National University, South Korea. His research interests include control of hydraulic
systems, dynamics and control, and mechatronics.
Young-Bae Kim received his B.S. degree in Mechanical Design from Seoul National University, South Korea in 1980. He then received his M.S.
degree in Mechanical Engineering from the Korean Advanced Institute of Science and Technology (KAIST), South Korea in 1982
and his Ph.D. degree in Mechanical Engineering from Texas A&M University, USA in 1990. Dr. Kim is currently a Professor of
the School of Mechanical and Systems Engineering in Chonnam National University, South Korea. Dr. Kim’s research interests
include mechatronics, dynamics and control, and fuel cell hybrid electric vehicle (FCHEV) systems. 相似文献
11.
The location and the size of a geometrically defected region in the side wall of a corner, which is generated during the flat
end-milling process, are investigated through experiments and geometrical analysis. A corner with inner and outer surfaces
is assumed to be made up of one arc-surface patch and two flat-surface patches. Based on the previous findings that the change
of material removal per tooth affects the geometry of the end-milled side wall, it is expected that the geometrically defected
regions are located around the corner when the tool is approaching and leaving the arc surface. In this respect, analytic
models are proposed to predict the location and the size of a geometrically defected region, which are then validated via
comparison with the experimental results.
This paper was recommended for publication in revised form by Associate Editor Dae-Eun Kim
Kun Sang Lee received his B. S. degree in Mechanical Engineering from Seoul National University, Korea, in 1982. He then received his
Dipl.-Ing. and Dr.-Ing. degrees from Technical University of Berlin, Germany, in 1991 and 1993, respectively. Dr. Lee is currently
a Professor at the School of Mechanical and Automotive Engineering at Kookmin University in Seoul, Korea. He serves as a Staff
of the Korea Engineering Education Research Center. His research interests include precision machining, high energy beam material
processing, and creative design methodology.
Kang Kim received his B. S. and M. S. degrees in Mechanical Design and Production Engineering from Seoul National University, Korea,
in 1982 and 1984, respectively. He then received his Ph.D. degree from Purdue University, USA, in 1992. Dr. Kim is currently
a Professor at the School of Mechanical and Automotive Engineering at Kookmin University in Seoul, Korea. His research interests
include material removal processes, and concurrent engineering. 相似文献
12.
Dong Hyun Kim Kyung Su Oh Seungho Park 《Journal of Mechanical Science and Technology》2009,23(6):1536-1543
This paper reports the design of a novel twisting-type micromirror actuation system. The actuating mechanism for driving the
micromirror combines two paralleled bimorph actuators bending in opposite directions for rotational control of the micromirror.
Each actuator is structured by gold and silicon dioxide or nickel and silicon nitride thin films with embedded polysilicon
line heaters. With a size of only 15μm in width, 1.3μm in thickness, and 100μm in length, two bimorph actuators can result
in a vertical displacement of 25μm at 10 volts dc with the span of 120μm, and thus the micromirror can rotate by angles over
20°, which is a significant improvement, compared to conventional tilting-type micromirrors.
This paper was recommended for publication in revised form by Associate Editor Dongsik Kim
Dong Hyun Kim received his B.S. and M.S. degrees in Mechanical Engineering from Hongik University, Korea, in 2005 and 2007, respectively.
Mr. Kim is currently graduate student in the department of Mechanical Engineering at Hongik University in Seoul, Korea. His
research interests include micro and nanoscale heat transfer and silicon crystallization technologies for displays.
Kyung Su Oh received his B.S. and M.S. degrees in Mechanical Engineering from Hongik University, Korea, in 2005 and 2007, respectively.
Mr. Oh is currently a research scientist at LG Chem. Ltd. His research interests include nanoscale heat transfer, nanotubes
and fuel cells and molecular simulation technology.
Seungho Park received his B.S. and M.S. degrees in Mechanical Engineering from Seoul National University, Korea, in 1981 and 1983, respectively.
He then received his Ph.D. degree from U.C. Berkeley, U.S.A. in 1989. Dr. Park is currently a Professor at the department
of Mechanical and System Design Engineering at Hongik University in Seoul, Korea. He served as a director of general affairs
of KSME. Dr. Park’s research interests include micro and nanoscale heat transfer, molecular dynamics simulation and silicon
crystallization technologies for displays. 相似文献
13.
Jae Hyuk Choi Junhong Kim SangKyu Choi Byoung-Ho Jeon Osamu Fujita Suk Ho Chung 《Journal of Mechanical Science and Technology》2009,23(3):707-716
A numerical study on soot deposition in ethylene diffusion flames has been conducted to elucidate the effect of thermophoresis
on soot particles under a microgravity environment. Time-dependent reactive-flow Navier-Stokes equations coupled with the
modeling of soot formation have been solved. The model was validated by comparing the simulation results with the previous
experimental data for a laminar diffusion flame of ethylene (C2H4) with enriched oxygen (35% O2 + 65% N2) along a solid wall. In particular, the effect of surrounding air velocity as a major calculation parameter has been investigated.
Especially, the soot deposition length defined as the transverse travel distance to the wall in the streamwise direction is
introduced as a parameter to evaluate the soot deposition tendency on the wall. The calculation result exhibits that there
existed an optimal air velocity for the early deposition of soot on the surface, which was in good agreement with the previous
experimental results. The reason has been attributed to the balance between the effects of the thermophoretic force and convective
motion.
This paper was recommended for publication in revised form by Associate Editor Ohchae Kwon
Jae Hyuk Choi received his B.S. and M.S. degrees in Marine System Engineering from Korea Maritime University in 1996 and 2000, respectively.
He then went on to receive a Ph.D. degrees from Hokkaido university in 2005. Dr. Choi is currently a BK21 Assistant Professor
at the School of Mechanical and Aerospace Engineering at Seoul National University in Seoul, Korea. Dr. Choi’s research interests
are in the area of reduction of pollutant emission (Soot and NOx), high temperature combustion, laser diagnostics, alternative
fuel and hydrogen production with high temperature electrolysis steam (HTES).
Junhong Kim received his B.S., M.S., and Ph. D degrees in Mechanical Engineering from Seoul National University in 1998, 2000, and 2004,
respectively. His research interests include lifted flames, edge flames, and numerical simulation.
Sang Kyu Choi received his B.S. degree in Mechanical Engineering from Seoul National University in 2004. He is a Ph. D student in the School
of Mechanical Engineering, Seoul National University. His research interests include edge flames, oxy-fuel combustion, and
numerical simulation.
Byoung ho Jeon received his B.S degrees in Mechanical Engineering from kangwon University in 1998, and M.S., Ph. D. degrees in Mechanical
Engineering from Hokkaido University in 2002, 2008, respectively. Dr Jeon is working at Korea Aerospace Research Institute
from 2007. June. as Gasturbine engine developer. Jeon’s research interests are in the area of reduction of pollutant emission
(Soot and Nox), High temperature combustion, combustion system (Furnace, Combine Generation system, IGCC, CTL), and Fire safety
in building.
Osamu Fujita received his B.S., M.S., and Ph. D. degrees in Mechanical Engineering from Hokkaido University in 1982, 1984, and 1987, respectively.
Prof. Fujita is currently a Professor at the division of Mechanical and space Engineering at Hokkaido University in sapporo,
Japan. Prof. Fujita’s research interests are in the area of reduction of pollutant emission (Soot and Nox), solid combustion,
catalytic combustion, high temperature combustion, alternative fuel and fire safety in space.
Suk Ho Chung received his B.S. degree in Mechanical Engineering in 1976 from Seoul National University, and his M.S. and Ph. D. degree
in Mechanical Engineering in 1980 and 1983, respectively from Northwestern University. He is a professor since 1984 in the
School of Mechanical and Aerospace Engineering, Seoul National University. His research interests cover combustion fundamentals,
pollutant formation, and laser diagnostics. 相似文献
14.
Byeong-Soo Kim Yong-Bin Lee Dong-Hoon Choi 《Journal of Mechanical Science and Technology》2009,23(4):1175-1181
In order to increase the efficiency of design optimization, many efforts have been made on studying the metamodel techniques
for effectively representing expensive and complex models. In this study, a comparison is conducted on the accuracy of several
widely used meta-model techniques — moving least squares (MLS), Kriging, support vector regression (SVR) and radial basis
functions (RBF) — which are able to approximate non-convex functions well. RMSE (root mean squared error) value is identified
as a measure of the accuracy for this comparison. Each metamodel technique is used to approximate the six well-known mathematical
functions and a resign of experiment (DOE) is generated by using the Latin hypercube design (LHD), which is also performed
for each resulting metamodel. The results show that Kriging and MLS can create a more accurate metamodel than SVR and RBF
with the mathematical functions tested.
This paper was recommended for publication in revised form by Associate Editor Dae-Eun Kim
Byeong-Soo Kim received B.S and M.S. degree in Mechanical Engineering from Hanyang University in 2006 and 2008, respectively. Mr. Kim is
currently a Research Engineer at LG Electronics.
Yong-Bin Lee received a B.S. and M.S. degree in Mechanical Engineering from Hanyang University in 2002 and 2004, respectively. He is currently
a Ph.D. student in Hanyang University. Mr. Lee’s research interests are in the area of optimization, approximation, and design
of experiments.
Dong-Hoon Choi received a B.S. degree in Mechanical Engineering from Seoul National University in 1975. He then went on to receive his M.S.
from KAIST in 1977 and Ph. D. degree from University of Wisconsin-Madison in 1986, respectively. Dr. Choi is currently a Professor
at the School of Mechanical Engineering at Hanyang University in Seoul, Korea. He is currently the director of iDOT(the center
of innovative design optimization technology). Prof. Choi’s research interests are in the area of optimization techniques:
developing MDO methodology, developing optimization techniques to ensure a reliability of optimum solution, and developing
approximation optimization technique, etc. 相似文献
15.
Katsuki Masashi Chung Jin-Do Kim Jang-Woo Hwang Seung-Min Kim Seung-Mo Ahn Chul-Ju 《Journal of Mechanical Science and Technology》2009,23(3):614-623
Combustion in high-preheat and low oxygen concentration atmosphere is one of the attractive measures to reduce nitric oxide
emission as well as greenhouse gases from combustion devices, and it is expected to be a key technology for the industrial
applications in heating devices and furnaces. Before proceeding to the practical applications, we need to elucidate combustion
characteristics of non-premixed and premixed flames in high-preheat and low oxygen concentration conditions from scientific
point of view. For the purpose, we have developed a special mixing nozzle to create a homogeneous mixture of fuel and air
by rapid mixing, and applied this rapidmixing nozzle to a Bunsen-type burner to observe combustion characteristics of the
rapid-mixture. As a result, the combustion of rapid-mixture exhibited the same flame structure and combustion characteristics
as the perfectly prepared premixed flame, even though the mixing time of the rapid-mixing nozzle was extremely short as a
few milliseconds. Therefore, the rapid-mixing nozzle in this paper can be used to create preheated premixed flames as far
as the mixing time is shorter than the ignition delay time of the fuel.
This paper was recommended for publication in revised form by Associate Editor Ohchae Kwon
Masashi Katsuki received his B.E. degree in Mechanical Engineering from Osaka University, Japan, in 1965. He received his Dr. Eng. from O.
U. in 1985. Dr. Katsuki is currently a Visiting Professor at the Department of Environmental Engineering at Hoseo University
in Chungnam, Korea. He was a Vice President of the Japan Society of Mechanical Engineers. Dr. Katsuki’s research interests
include combustion, computational thermo-fluid dynamics, and molecular dynamics.
Jin-Do Chung received his B. S., M.S. and Ph.D. degrees in Mechanical Engineering from Chungnam University, Korea in 1983, 1985 and 1990.
He then received another Ph.D. in Environmental Engineering from Kanazawa University, Japan in 1996. After that he worked
as Post-doc researcher for 1,6 year at KIMM and Senior researcher for 6years at KEPCO Research Center. Dr. Chung is currently
a Professor at the Department of Environmental Engineering at Hoseo University in Asan, Korea. Dr. Chung’s research interests
include thermal-fluid and environmental engineering.
Jang-Woo Kim received his B. S. degree in Mechanical Engineering from Chungnam University, Korea, in 1990. He then received his M. S.
and Ph. D. degrees from Kyushu University, Japan in 1994 and 1998, respectively. Dr. Kim is currently a Professor at the School
of Display Engineering at Hoseo University in Asan, Korea. Dr. Kim’s research interests include CFD, aerodynamics, and display
equipment technology.
Seung-Min Hwang received the Ph.D. degree in Mechanical Engineering at Osaka University in 2005. After that he worked as visiting researcher
for 3 years at CRIEPI (central research institute of electric power industry) and Osaka University in Japan. He is currently
a Professor at the Graduate School of Venture at Hoseo University in Korea. His major research is thermal-fluid, energy issue
and environment.
Seung-Mo Kim received his Ph. D. degrees in Mechanical engineering from Osaka University, Japan, in 2004. Dr. Kim is currently a research
Professor at Pusan Clean Coal Center at Pusan National University in Pusan, South Korea. Dr. Kim’s research interests include
coal combustion, oxy-fuel combustion, coal gasification, coal de-watering, power generation plant system and energy issues.
Chul-Ju Ahn received his B.S. degree in Mechanical Engineering from Hanyang University, Korea, in 1998. He then received his M.S. and
Ph.D. degrees from Osaka University, Japan, in 2001 and 2006, respectively. Dr. Ahn is currently a Senior Research Engineer
at Samsung Techwin CO. LTD. in Changwon, Korea. Dr. Ahn’s research interests include gas turbine engine, biomass gasification,
and power system. 相似文献
16.
Loop heat pipes often experience start-up problems especially under low thermal loads. A bypass line was installed between
the evaporator and the liquid reservoir to alleviate the difficulties associated with start-up of a loop heat pipe with flat
evaporator. The evaporator and condenser had dimensions of 40 mm (W) by 50 mm (L). The wall and tube materials were stainless
steel and the working fluid was methanol. Axial grooves were provided in the flat evaporator to serve as vapor passages. The
inner diameters of liquid and vapor transport lines were 2 mm and 4 mm, respectively, and the length of the two lines was
0.5 m each. The thermal load range was up to 130 W for horizontal alignment with the condenser temperature of 10°C. The experimental
results showed that the minimum thermal load for start-up was lowered by 37% when the bypass line was employed.
This paper was recommended for publication in revised form by Associate Editor Dae Hee Lee
Joon Hong Boo received his B.S. degree in Mechanical Engineering from Seoul National University in 1978. He then received his M.S.M.E.
and Ph.D. degrees from Georgia Institute of Technology in 1984 and 1989, respectively. Dr. Boo is currently a Professor in
the School of Aerospace and Mechanical Engineering at Korea Aerospace University, where he joined in 1989. His research interests
include heat transfer, heat pipes, and energy systems. He conducted joint research with Texas A&M University and Waseda University
in 1994 and 2008, respectively, as Visiting Professor. Dr. Boo is an active member of the International Heat Pipe Conference
Committee.
Eui Guk Jung received his B.S. and M.S. degrees in Aerospace and Mechanical Engineering from Korea Aerospace University, in 2002 and 2004,
respectively. He is currently a Ph.D. candidate in the Graduate School at Korea Aerospace University. His research interests
include applications of heat pipes and loop heat pipes. 相似文献
17.
Hyuck-Keun Oh Sae Byul Kang Young Ki Choi Joon Sik Lee 《Journal of Mechanical Science and Technology》2009,23(6):1544-1552
An optimization of rapid thermal processing (RTP) was conducted to obtain uniform temperature distribution on a wafer surface
by using linear programming and radiative heat transfer modeling. The results show that two heating lamp zones are needed
to maintain uniform wafer temperature and the optimal lamp positions are unique for a given geometry and not affected by wafer
temperatures. The radii of heating lamps, which were obtained by optimization, are 45 mm and 108 mm. The emissivity and temperature
of the chamber wall do not significantly affect the optimal condition. With obtained optimum geometry of the RTP chamber and
lamp positions, the wafer surface temperatures were calculated. The uniformity allowance of the wafer surface is less than
±1°C when the mean temperature of the wafer surface is 1000°C.
This paper was recommended for publication in revised form by Associate Editor Dongsik Kim
Hyuck-Keun Oh received the B.S. and M.S degrees in Mechanical & Aerospace Engineering from Seoul National University in 2000 and 2002,
respectively. He had experienced mechanical and electrical engineering in the Samsung SDI Corporation on various display devices
between 2002 and 2007. He is now pursuing the Ph.D degree in Mechanical & Aerospace engineering at Seoul National University,
Korea. His research interests are heat transfer and thermal management with a focus on power generation and energy efficiency.
Sae Byul Kang received the B.S degree in Mechanical engineering from Korea University in 1996. He then went on to receive his M.S and Ph.D.
degrees from Seoul National University in 1998 and 2003, respectively. Dr. Kang is currently a senior researcher at the Korea
Institute of Energy Research in Daejeon, Korea. Dr. Kang’s research interests are development of industrial boiler and burner
for bio-mass.
Young Ki Choi received the B.S and M.S degrees in Mechanical engineering from Seoul National University in 1978 and 1980, respectively
and the Ph.D. de-gree in mechanical engineering from the University of California at Berkeley in 1986. He is currently a professor
at the School of Mechanical Engineering, Chung Ang University, Korea. His research interests are in the area of micro/nanoscale
energy conversion and transport, computational fluid dynamics, and molecular dynamics simulations.
Joon Sik Lee received the B.S and M.S degrees in Mechanical engineering from Seoul National University in 1976 and 1980, respectively
and the Ph.D. degree in mechanical engineering from the University of California at Berkeley in 1985. He is currently a professor
at the School of Mechanical & Aerospace Engineering, Seoul National University, Korea. He is also the director of Micro Thermal
System Research Center. His research interests are in the area of micro/nanoscale energy conversion and transport, thermal
management for power generation and energy efficiency, and various convective heat transport phenomena such as pool boiling
and nanofluid. 相似文献
18.
Hee-Jang Moon Yang-Ho Park Youngbin Yoon 《Journal of Mechanical Science and Technology》2009,23(6):1751-1759
The characteristics of NOx emissions in pure hydrogen nonpremixed jet flames with coaxial air are analyzed numerically for
a wide range of coaxial air conditions. Among the models tested in simple nonpremixed jet flame, the one-half power scaling
law could be reproduced only by the Model C using the HO2/H2O2 reaction, implying the importance of chemical nonequilibrium effect. The flame length is reduced significantly by augmenting
coaxial air, and could be represented as a function of the ratio of coaxial air to fuel velocity. Predicted EINOx scaling
showed a good concordance with experimental data, and the overall one-half power scaling was observed in coaxial flames with
Model C when flame residence time was defined with flame volume instead of a cubic of the flame length. Different level of
oxygen mass fraction at the stoichiometric surface was observed as coaxial air was increased. These different levels imply
that the coaxial air strengthens the nonequilibrium effect.
This paper was recommended for publication in revised form by Associate Editor Haecheon Choi
Hee-Jang Moon received his B.S. degree in Aeronautical Engineering from Inha University, Korea in 1986. He then received his M.S. and Doctoral
degrees from Universite de Rouen, France in 1988 and 1991, respectively. Dr. Moon is currently a Professor at the School of
Aerospace and Mechanical Engineering at Korea Aerospace University in Koyang, Korea. He serves on the Editorial Board of the
Korean Society of Propulsion Engineers. His research interests are in the area of turbulent combustion, hybrid rocket combustion
and nanofluids.
Youngbin Yoon received his B.S. and M.S. degrees in Aerospace Engineering from Seoul National University, Korea in 1985 and 1987, respectively.
He received a Ph.D. degree from the University of Michigan in 1994. Dr. Yoon is currently a professor at the School of Mechanical
and Aerospace Engineering in Seoul National University, Korea. He is currently on the Editorial board and executive of ILASS-KOREA.
The research areas of Dr. Yoon are liquid rocket injectors, combustion instability and control, ram and gas turbine combustor
and laser diagnostics. 相似文献
19.
Kwang Hoon Park Kang Mo Yang Keon Woo Lee Hyung Hee Cho Hee Chul Ham Ki Young Hwang 《Journal of Mechanical Science and Technology》2009,23(7):1852-1857
A slot film cooling technique has been used to protect a combustor liner from hot combustion gas. This method has been developed
for gas turbine combustors. A ramjet combustor exposed to high temperature can be protected properly with a multi-slot film
cooling method. An experimental study has been conducted to investigate the change of the first slot angle under recirculation
flow and the influence of wiggle strip within a slot, which affects the film cooling effectiveness. The first slot angle has
been changed to understand the effect of the injection angle on the film cooling effectiveness in a recirculation zone. The
distribution of dimensionless temperature was obtained by a thermocouple rake to investigate the wiggle strip effect, and
the adiabatic film cooling effectiveness on downstream wall was measured by a thermochromic liquid crystal (TLC) method. At
the first slot position, the film cooling effectiveness decreases significantly because of the effects of recirculation flow.
The lip angle of the first slot affects slightly on the film cooling effectiveness. The wiggle strip reinforces the structure
of slot and keeps the uniform open area of slot. However, it induces three dimensional flows and enhances the flow mixing
between the main flow and the injected slot flow. Therefore, the wiggle strip decreases slightly the overall film cooling
effectiveness.
This paper was presented at the 7th JSME-KSME Thermal and Fluids Engineering Conference, Sapporo, Japan, October 2008.
Kwanghoon Park received his M.S degree in Mechanical Engineering from Yonsei University, Seoul, Korea in 2007. He is currently working for
an education of an officer as a drillmaster in Army Consolidated Logistics School.
Kang Mo Yang joined the Republic of Korea Army in 2004. He is currently working towards the M.S. degree at the Department of Mechanical
Engineering, Yonsei University.
Keon Woo Lee received his M.S. degree in Mechanical Engineering from Yonsei University, Seoul, Korea in 2008. In 2008, he joined the Doosan
heavy industries & Construction Co, LTD, where he is a member of the IGCC Business Team.
Hyung Hee Cho received his PhD degree in Mechanical Engineering from University of Minnesota, Minneapolis, MN in 1992. In 1995, he joined
the Department of Mechanical Engineering, Yonsei University, Seoul, Korea, where he is currently a full professor in the School
of Mechanical Engineering. His research interests include heat transfer in turbomachineries, rocket/ramjet cooling as well
as nanoscale heat transfer in thin films, and microfabricated thermal sensors.
Hee Cheol Ham received his PhD degree in Mechanical Engineering from Yonsei University, Seoul, Korea in 2001. In 1984, he joined the Agency
for Defense Development, Daejeon, Korea, where he is currently a Principal Researcher.
Ki Young Hwang received his Ph.D. degree in Mechanical Engineering from Yonsei University, Seoul, Korea in 1994. In 1979, he joined the
Agency for Defense Development, Daejon, Korea, where he is currently a principal researcher in the Airbreathing Propulsion
Directorate. 相似文献
20.
Changhee Kim Mansoo Lee Cheolheui Han 《Journal of Mechanical Science and Technology》2008,22(12):2534-2541
The hydraulic transport characteristics of sand-water mixtures in circular and square pipelines are experimentally investigated
by changing the Reynolds number and volumetric delivered concentration. The hydraulic gradients are increased along with the
Reynolds number. When the mean velocity is larger than the critical velocity, the hydraulic gradient of sand-water mixture
in the square duct is larger than that in the circular pipe. The deposition-limit velocity in the square duct is smaller than
that in the circular pipe. Thus, it can be concluded that the square duct transports sands more effectively than the circular
pipe in a low operating range of velocity. The empirical correlation between the hydraulic gradient and the Reynolds number
is obtained. It is believed that the present data and empirical equation can be used to validate the numerical methods developed
for the analysis of the transport characteristics of slurry in the circular and square pipelines.
This paper was recommended for publication in revised form by Associate Editor Jun Sang Park
Chang-Hee Kim received a B.S. degree in Mechanical Engineering from Hanyang University in 1985. He then went on to receive his M.S. degrees
from Hanyang University in 1994. Mr. Kim has joined Hyundai Engineering and Construction Company after his degree and is currently
working for Oil & Gas Plant as a Procurement Manager.
Man-Soo Lee received his M.S. and Ph.D. degrees from civil eng. dept. of Seoul National University in 1992 and 2004, respectively. He
has joined Hyundai Engineering and Construction company since 1991 as a research engineer. Recently assisting a big dredging
& reclamation project of Hyundai near Incheon Airport in Korea, he is responsible for the geotechnical researching team of
civil engineering division at Hyundai Institute of Construction Technology.
Cheol-Heui Han received a B.S. degree in Mechanical Engineering from Hanyang University in 1993. He received his M.S. and Ph.D. degrees
from Hanyang University. in 1998 and 2003, respectively. Then, he worked as a visiting post-doctoral researcher at the Dept.
of Aerospace and Ocean Engineering at Virginia Tech, USA. Dr. Han is currently a Assistant Professor at the Department of
Aeronautical and Mechanical Design Engineering. Dr. Han’s research interests are in the area of biomimetics, aircraft and
turbomachine design. 相似文献