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1.
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
2.
Jin Hwan Ko Jee Woong Kim Soo Hyung Park Doyoung Byun 《Journal of Mechanical Science and Technology》2009,23(6):1727-1735
Nature-inspired flapping foils have attracted interest for their high thrust efficiency, but the large motions of their boundaries
need to be considered. It is challenging to develop robust, efficient grid deformation algorithms appropriate for the large
motions in three dimensions. In this paper, a volume grid deformation code is developed based on finite macro-element and
transfinite interpolation, which successfully interfaces to a structured multi-block Navier-Stokes code. A suitable condition
that generates the macro-elements with efficiency and improves the robustness of grid regularity is presented as well. As
demonstrated by an airfoil with various motions related to flapping, the numerical results of aerodynamic forces by the developed
method are shown to be in good agreement with those of an experimental data or a previous numerical solution.
This paper was recommended for publication in revised form by Associate Editor Do Hyung Lee
Jin Hwan Ko received his B.S. degree in Mechanical Engineering from KAIST, Korea, in 1995. He then received his M.S. and Ph.D. degrees
from KAIST in 1997 and 2004, respectively. Dr. Ko is currently a research professor at the School of Mechanical and Aerospace
Engineering at Seoul National University in Seoul, Korea. His research interests include fluid-structure interaction analysis,
structural dynamics of a micro-scale resonator, and model order reduction.
Soo Hyung Park received his B.S. degree in Aerospace Engineering from KAIST, Korea, in 1996. He then received his M.S. and Ph.D. degrees
from KAIST in 1999 and 2003, respectively. Prof. Park is currently an assistant professor at the Dept. of Aerospace Information
Engineering at Konkuk University in Seoul, Korea. His research interests include computational fluid dynamics, fluid-structure
interaction analysis, rotorcraft aerodynamics, and turbulence modeling. 相似文献
3.
Ilyong Yoo Einkeun Kwak Seungsoo Lee Beom Soo Kim Si Hyong Park 《Journal of Mechanical Science and Technology》2009,23(3):802-813
A numerical procedure for aerodynamic load analysis of long span bridges is presented. The preconditioned Reynolds averaged
Navier-Stokes equations are adopted to compute flows over the bridges. To capture the turbulent characteristics of the flows,
two equation turbulence models, Coakley’s q − ω model and Menter’s k − ω SST model, are used to compute the turbulent viscosity. A dual time stepping method in conjunction with the AF-ADI method
is used to advance the solution in time. A loosely coupled method of the preconditioned RANS equations with the turbulence
model equations is employed for fast computation without losing numerical stability. The numerical method for the aerodynamic
load analysis is verified against well-known benchmark problems. Aerodynamic loads of two real bridges are computed with the
method to demonstrate the usefulness of the method.
This paper was recommended for publication in revised form by Associate Editor Kyung-Soo Yang
Ilyong Yoo is a Ph.D. candidate in Aerodynamic Analysis and Design Laboratory at Inha University. He received his B.S. and M.S. degrees
in Aerospace Engineering from Inha University in 2004 and 2006, respectively. His research area includes computational fluid
dynamics, and its application to active flow control using MEMS devices.
Einkeun Kwak is a Ph.D. candidate in Aerodynamic Analysis and Design Laboratory at Inha University. He holds B.S. and M.S. degrees in
Aerospace Engineering from Inha University. His research area includes computational fluid dynamics, and its application to
supersonic inlet analysis and design.
Seungsoo Lee is a professor in Aerospace Engineering at Inha University. Prior to joining the faculty at Inha University, he was a senior
research engineer at the Agency for Defense Development. He earned his Ph.D. degree from the Pennsylvania State University
in 1990. He also holds B.S. and M.S degrees in Aeronautical and Astronautical Engineering from Seoul National University.
Dr. Lee’s research interests are in the area of computational fluid dynamics, overset grid method, and applied aerodynamics.
Beom Soo Kim received his B.S. and M.S degrees in Aeronautical and Astronautical Engineering from Seoul National University in 1974 and
1977, respectively. He earned his Ph.D. degree from University of Oklahoma in 1983. Dr. Kim is currently a Professor at the
Department of Aerospace Engineering at Inha University. Dr. Kim’s research interests are in the area of hypersonic aerodynamics,
and wind tunnel testing.
Si Hyong Park is a developer in the applied analysis team of MidasIT Co. Ltd, Korea. He received the Bachelor, the Master and the Ph.D
degree in Aerospace Engineering from Seoul National University in 1996, in 1998 and in 2003, respectively. His research interest
is currently development of CAE software including FEM, CFD and Multi-physics simulation. 相似文献
4.
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
5.
WookJe Park Sang H. Lee JungIl Song 《Journal of Mechanical Science and Technology》2009,23(2):302-310
This paper describes the flight test method for studying the primary control surface stuck condition and the combination stuck
of the primary control. An aircraft must show controllability and trimmability under post-failure conditions. An aircraft
is successfully tested under various fault conditions. It is recognized that a control surface fault is detected by monitoring
the value of the coefficients related to the control surface deviation. The control surface stuck position is determined by
comparing the trim value with the reference value. To detect and isolate the fault, an analysis that employs the real-time
parameter estimation method is used. If the flight control system is reconfigured using online estimates of aircraft parameters
from a real-time parameter estimation scheme, the reliability increases without the addition of sensors or additional cost.
This paper was recommended for publication in revised form by Associate Editor Eung-Soo Shin
Wook-Je Park received the B.S. and the Ph.D. degrees, both in Aeronautical Engineering, from Korea Aerospace University in 1994 and 2005,
respectively. He is now a Post-Doc in Mechanical and Aeronautical Engineering, Western Michigan University. His research interests
are in fault detection and isolation, real-time parameter estimation method, flight test, and their application in aircraft
and UAV.
Sang-Hyuk Lee received the Ph. D. degree in Electrical Engineering from Seoul National University in 1998. Dr. Lee has been with the Changwon
National University as a research professor since 2006. His research interests include fuzzy theory, game theory, and nonlinear
control.
Jung-Il Song received his Ph. D. degree in Mechanical Engineering from POSTECH, Korea, in 1997. Dr. Song is currently a Professor at the
School of Mechanical Engineering at Changwon National University in Changwon, Korea. His research interests include manufacturing
process and evaluation of composites, biomedical engineering and rehabilitation engineering. 相似文献
6.
This study applies DE (discrete element) computational method to the dynamic problems of a vibrating string. The DE method
was originally initiated to analyze granular materials and now it has expanded to model fabric dynamics which is of interest
in a number of applications including those that manufacture or handle textiles, garments, and composite materials. Owing
to the complex interactions between each discrete element, simple circular geometric rigid model has been used in the conventional
DE method. However, in order to analyze the slender shape and flexibility of materials such as fabrics or strings, longer
and flexible geometric models, named as fiber models, was developed. The fiber model treats a series of connected circular
particles, and further can be classified as being either a RF (rigid fiber) or a CFF (completely flexible fiber) model. To
check the feasibility of those models, dynamic problems were solved and it is found that the fiber models accurately simulate
the dynamic and vibration behaviors of horizontally or vertically placed strings.
This paper was recommended for publication in revised form by Associate Editor Hong Hee Yoo
Junyoung Park received B.S. and M.S degrees in Mechanical Engineering from Kyungpook National University in 1996 and 1998, respectively.
He then went on to receive his Ph.D. degree from Purdue University in 2003. Dr. Park is currently an assistant professor at
the School of Mechanical Engineering at Kumoh National Institute of Technology in Gumi, Korea. Dr. Park’s research interests
are in the area of nano technology, particle technology, and analysis of pedestrian flow.
Namcheol Kang received B.S. and M.S degrees in Mechanical Engineering from KAIST and Seoul National University in 1992 and 1994, respectively.
He then went on to receive his Ph.D. degree from Purdue University in 2004. Dr. Kang is currently an assistant professor at
the School of Mechanical Engineering at Kyungpook National University in Daegu, Korea. Dr. Kang’s research interests are in
the area of dynamics, vibration and stability of a multiscale mechanical system. 相似文献
7.
Taewoong Lim Jaeik Jeong Jaewon Chung Jin Taek Chung 《Journal of Mechanical Science and Technology》2009,23(7):1788-1794
In this work, the evaporation phenomena of 20–45 picoliter water droplet (i.e. 50–65 μm diameter) on heated substrates with
different thermal conductivity are studied experimentally. The effect of thermal conductivity of substrates and inter-distance
between jetted droplets on the evaporation is investigated. In addition, the model to predict evaporation rate of the picoliter
droplet on different substrates at a heated condition is developed using approximations for picoliter droplet.
This paper was presented at the 7th JSME-KSME Thermal and Fluids Engineering Conference, Sapporo, Japan, October 2008.
Taewoong Lim received his B.S and M.S. degree in mechanical engineering from Korea University, Seoul, Korea in 2007 and 2009, respectively.
His thesis topic was the evaporation of inkjet printed pico-liter droplet and He has been working at Hyundai Motor Company.
Jaeik Jeong received his B.S. degree in mechanical engineering from Korea University in 2008. He is currently a M.S. candidate in mechanical
engineering at Korea University.
Jaewon Chung received his B.S. and M.S. degrees in mechanical engineering from Yonsei University, Seoul, Korea in 1995 and 1997, respectively
and Ph.D. degree from University of California, Berkley in 2002. He was postdoctoral associate in Engineering System Research
Center at University of California, Berkley in 2002–2004 and had worked in the Center of Micro and Nano Technology at Lawrence
Livermore National Laboratory as a visiting collaborator. He is a currently an associate professor at the Department of Mechanical
Engineering at Korea University in Seoul, Korea. His research interests include direct writing methods including drop on demand
inkjet printing, electrohydrodynamic printing and laser material processing for printing electronics.
Jin Taek Chung received his B.S. and M.S. degrees in mechanical engineering from Korea University, Seoul, Korea in 1983 and 1985, respectively
and Ph. D. degree from University of Minnesota, U.S.A. in 1992. He is a currently a professor at the Department of Mechanical
Engineering at Korea University in Seoul, Korea. His research interests are heat transfer and 3-D flow in gas turbines and
thermal management of electronic devices. 相似文献
8.
Joon Lyou MinSig Kang HwyKuen Kwak YoungJun Choi 《Journal of Mechanical Science and Technology》2009,23(8):2097-2106
This paper presents a combined dual stage-based mechanical and image-based stabilization scheme for a three-axis image-tracking
sight system. To improve the stabilization and tracking accuracy, a secondary stage actuated by a pair of electro-magnets
is mounted on a conventional elevation gimbal. For the remaining roll axis stabilization, an electronic digital- image stabilization
technique is introduced to estimate and correct roll motions. Experimental results are given to demonstrate the effectiveness
of the proposed stabilization system and the image-stabilization scheme.
This paper was recommended for publication in revised form by Associate Editor Dong Hwan Kim
Joon Lyou received a B.S. degree in Electronics Engineering from Seoul National University in 1978. He then went on to receive M.S.
and Ph.D. degrees from KAIST in 1980 and 1984, respectively. Dr. Lyou is currently a professor of the Department of Electronics
Engineering at Chungnam National University in Daejeon, Korea. His research interests include industrial control and sensor
signal processing, IT based robotics, and navigation systems.
MinSig Kang received a B.S. degree from the Department of Mechanical Engineering of Seoul National University in 1980. He then went on
to receive M.S. and Ph.D. degrees from KAIST in 1983 and 1987, respectively. He worked for the Agency for Defence Development
during 1987–1998. Dr. Kang is currently a professor of the Department of Mechanical and Automotive Engineering at Kyungwon
University in Sungnam, Korea. His research interests include dynamic systems measurement and control, industrial robotics,
and manufacturing systems.
HwyKuen Kwak received a B.S. degree in Electronics Engineering from Chungnam National University in 2005. He is currently working on his
M.S. and Ph.D. course at Chungnam National University in Daejeon, Korea. His research areas are image signal processing, sensors
and digital control systems.
YoungJun Choi received a B.S. and M.S. degree in Mechanical Engineering from Kyungwon University in 2004 and 2006. He is currently a researcher
for the Agency for Defence Development in Daejeon, Korea. His research fields are dynamic systems measurement and control,
satellite systems, navigation systems and smart materials. 相似文献
9.
Recently, a linear motor has been becoming widely popular in office automation (OA) and factory automation (FA) systems due
to its simple structure, high-speed operation, and precise positioning. In this study, a cored linear motor was designed to
have a large thrust and small ripple because these are considered as indicators of motor performance. The thrust and ripple
of the linear motor can be calculated by a finite element method (FEM) commercial program such as ANSYS. To design the cored
linear motor, first, the design variables were selected through ANOM and ANOVA. The response surface method was applied to
formulate the cost function of the second-order regression model, which can evaluate motor performance. By optimizing the
cost function, it was possible to realize quickly the optimum design for a cored linear motor. As a result, the performance
of the motor was improved.
This paper was recommended for publication in revised form by Associate Editor Tae Hee Lee
Mr. Sungill Seo received his B.S. and M.S. degree from the department of Mechanical Engineering, Sogang University, Seoul, S. Korea in 2006
and 2009, respectively. Mr. Seo is currently working for Hyundai Engineering. His research interests are in the area of optimum
design of electric motors, metal forming, and process design.
Naksoo Kim received his B.S. and M.S. degree from the department of Mechanical Design, Seoul National Uni-versity in 1982 and 1984,
respectively. He then went on to receive his Ph. D. degree from U.C. Berkeley. Dr. Kim had worked for the ERC/NSM at the Ohio
State University as a senior researcher and Hongik University as an assistant professor. He is currently a professor at the
department of mechanical engineering, Sogang University. Dr. Kim’s research interests are in the area of metal forming plasticity,
computer aided process analysis, and optimal design. 相似文献
10.
László Baranyi Szilárd Szabó Betti Bolló Róbert Bordás 《Journal of Mechanical Science and Technology》2009,23(7):1829-1834
The objective of this study is to investigate the forced convection from and the flow around a heated cylinder. Experimental
and computational results are presented for laminar flow around a heated circular cylinder with a diameter of 10 mm. The experiments
were carried out using Particle Image Velocimetry (PIV) in a wind tunnel, and numerical simulations using an in-house code
and a commercial software package, FLUENT. This paper presents comparisons for vorticity and temperature contours in the wake
of the cylinder. Experimental and computational results are compared with those available in the literature for heated and
unheated cylinders. An equation is suggested for a temperature-dependent coefficient defining a reference temperature to be
used in place of the constant used in other studies. An attempt is also made to correct differences between average cylinder
surface temperature and measured interior temperature of the cylinder.
This paper was presented at the 7th JSME-KSME Thermal and Fluids Engineering Conference, Sapporo, Japan, October 2008.
László Baranyi received his MEng degree from the Technical University for Heavy Industry, Hungary, in 1975 and his PhD in 1990. He worked
as an associate professor at Nagaoka University of Technology, Japan, from 1995 to 1997. Dr. Baranyi is currently an associate
professor at the University of Miskolc, Hungary. He serves as an editor of the Journal of Computational and Applied Mechanics.
His research interests include bluff body aerodynamics and fluid-structure interaction.
Szilárd Szabó, PhD (1995, University of Miskolc), professor, head of Department of Fluid and Heat Engineering University of Miskolc, Hungary.
He earned his MSc degree in mechanical engineering in 1975 from the Technical University for Heavy Industry. He serves as
an editor of the Journal of Computational and Applied Mechanics and a deputy editor-in-chief of the Hungarian journal GéP.
Dr. Szabó’s research fields are supersonic gas ejectors, turbomachines, CFD, power engineering.
Betti Bolló, assistant at the Department of Fluid and Heat Engineering, University of Miskolc, Hungary. She received her MSc degree from
the University of Miskolc in Information Engineering (Systems of Power Engineering) in 2003. Ms Bolló’s research interests
include CFD and internal combustion engines.
Róbert Bordás, PhD student at the Laboratory of Fluid Dynamics and Technical Flows, University of Magdeburg “Ottovon-Guericke” in Germany.
He received his MSc degree from the Budapest University of Tech-nology in Integrated Engineering (Faculty of Mechanical Engineering)
in 2005. His research interests include optical measurements in engineering flows. 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.
Hyunwoo Bang Won Gu Lee Junha Park Hoyoung Yun Junggi Min Dong-Chul Han 《Journal of Mechanical Science and Technology》2009,23(5):1500-1507
This paper presents a novel method of optimizing particle-suspended microfluidic channels using genetic algorithms (GAs).
The GAs can be used to generate an optimal microchannel design by varying its geometrical parameters. A heuristic simulation
can be useful for simulating the emergent behaviors of particles resulting from their interaction with a virtual microchannel
environment. At the same time, fitness evaluation enables us to direct evolutions towards an optimized microchannel design.
Specifically, this technique can be used to demonstrate its feasibility by optimizing one commercialized product for clinical
applications such as the microchannel-type imaging flow cytometry of human erythrocytes. The resulting channel design can
also be fabricated and then compared to its counterpart. This result implies that this approach can be potentially beneficial
for developing a complex microchannel design in a controlled manner.
This paper was recommended for publication in revised form by Associate Editor Hong Hee Yoo
Hyunwoo Bang was born in Korea on June 2, 1978. He received the B.S. degree in mechanical and aerospace engineering from Seoul National
University, Seoul, Korea in 2001 and the Ph.D. degree in mechanical and aerospace engineering from Seoul National University
in 2007. He did postdoctoral research at University of California Los Angeles, CA that involved the integration of functional
biological components into engineered devices with Prof. Jacob J. Schmidt from April 2007 to August 2008. His current research
interests include microfluidics based Lab-on-a-chip devices and their design optimization using artificial intelligence.
Dong-Chul Han received the B.S. degree from the Department of Mechanical Engineering, Seoul National University, Seoul, Korea, in 1969,
and the Dipl.-Ing. and Dr.-Ing. degrees from the Department of Mechanical Engineering, University of Karlsruhe, Karlsruhe,
Germany, in 1975 and 1979, respectively. He also received the Habilitation from the Department of Mechanical Engineering,
University of Karlsruhe. He had been a professor in the school of Mechanical and Aerospace Engineering at Seoul National University
from 1982 to 2008. His research interests include active magnetic bearing systems, mechanical lubrication, Bio-MEMS (MicroElectroMechanical
Systems) and nano-fabrication. 相似文献
13.
Arjon Turnip Keum-Shik Hong Seonghun Park 《Journal of Mechanical Science and Technology》2009,23(1):229-236
The attenuation of engine vibration transmitted to a chassis has been a major focus in the automotive community for the increase
of comfort for the driver and passengers. A hydro-mount system is designed to reduce the transmission of engine vibration
to the chassis. It is also used for supporting the static load by an engine weight. In this paper, we present a modeling and
parameter estimation of hydro-mount systems. Nonlinear model aspects are developed and used with experimental data to validate
the model response characteristics. These parameters will be modeled as a variable vector and its value is estimated via linearized
and extended Kalman filter. This approach can help engineers reduce design time by providing insight into the effects of various
parameters within the hydro-mount. Based on the estimated parameters, the simulation result confirmed that the derived passive
model describes the dynamic behavior of the hydro-mount system accurately.
This paper was recommended for publication in revised form by Associate Editor Shuzhi Sam Ge
Arjon Turnip received his B.S. and M.S. degrees in Engineering Physics from the Institute of Technology Bandung, Indonesia, in 1998 and
2003, respectively. He is currently a Ph.D. program student in the School of Mechanical Engineering, Pusan National University,
Korea. His research areas are integrated vehicle control, adaptive control, and estimation theory.
Keum-Shik Hong received the B.S. degree in mechanical design and production engineering from Seoul National University in 1979, the M.S.
degree in ME from Columbia University in 1987, and both the M.S. degree in applied mathematics and the Ph.D. degree in ME
from the University of Illinois at Urbana-Champaign in 1991. He served as an Associate Editor for Automatica (2000–2006) and as an Editor for the International Journal of Control, Automation, and Systems (2003–2005). Dr. Hong received Fumio Harashima Mechatronics Award in 2003 and the Korean Government Presidential Award in
2007. Dr. Hong’s research interests include nonlinear systems theory, adaptive control, distributed parameter system control,
robotics, and vehicle controls.
Seonghun Park received his B.S. and M.S. degrees in mechanical engineering from KAIST in 1994 and 1996, respectively, and his Ph.D. degree
from Columbia University in 2005. Dr. Park is currently a professor of mechanical engineering at Pusan National University,
Korea. His research interests are in the areas of control, tribology, and biomechanics. 相似文献
14.
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
15.
In-Ho Song Jeongsam Yang Beom Park 《Journal of Mechanical Science and Technology》2008,22(11):2180-2189
Given that the amount of product data in firms is explosively increasing, a PDM system for effective data management is considered
indispensable for product development. However, considerable time and specialized human resources are needed to customize
a generic PDM system for satisfying the specific requirements of individual firms. To overcome this problem, we propose the
use of UML object models in a PDM authoring framework. A PDM authoring framework, which provides authoring functions for the
effective customization of PDM systems, will reduce the need for the intervention of PDM specialists in the design of the
object models of the PDM system. We describe how a PDM authoring framework may be designed by using UML object models, and
show how model-oriented application development (MOAD), in conjunction with the PDM authoring framework, can be used to build
object models into a PDM system. Furthermore, we confirm the value of the framework by evaluating its performance under several
conditions.
This paper was recommended for publication in revised form by Associate Editor Dae-Eun Kim
Inho Song is a postdoctoral associate in the Department of Mechanical Engineering, Carnegie Mellon University, USA. He received the
Ph.D. degree in Mechanical Engineering from Hanyang University, Seoul, Korea in 2007. From 2002 to 2007, he served as a CAx
team leader of the INOPS Company (CIES R&D Center), Seoul, Korea. He has developed the sketch-based CAD system for an automotive
company. His research interests include collaborative design, sketch-based CAD, geometry translation, geometry compression,
product data exchange, PDM/PLM, digital manufacturing, and virtual reality.
Jeongsam Yang is an assistant professor in the Department of Industrial & Information Systems Engineering and is leading the CAD laboratory() at Ajou University. He worked at Clausthal University of Technology (Germany) as a visiting researcher and the University
of Wisconsin-Madison (USA) as a postdoctoral associate. He obtained his Ph.D. in mechanical engineering in 2004 at KAIST.
His current research interests are product data quality (PDQ), VR application in product design, product data management (PDM),
knowledge-based design system, and STEP.
Peom Park is a professor in the Department of Industrial & Information Systems Engineering and is leading the Human Technology Research
Center and Human Factors/HCI laboratory () at Ajou University. He worked on HCI and Telecommunication system at ETRI as a senior researcher. He obtained his Ph.D.
in Industrial and Manufacturing Systems Engineering at Iowa State University on 1992. His current research interests are uT
applications, u-Healthcare/Telemedicine, Telematics and Ergonomic/Safety Design. 相似文献
16.
Kyoung-Ho Kang Byong-Jo Yun Dong-Jin Euh Won-Pil Baek 《Journal of Mechanical Science and Technology》2009,23(3):758-767
A new instrument, an averaging bidirectional flow tube (BDFT), is proposed to measure single-phase flow rates. This averaging
BDFT has unique measuring characteristics foremost among which is the capability to measure bidirectional flow and insensitivity
of the fluid attack angle. Single phase calibration tests were conducted to demonstrate the performance of the averaging BDFT.
Likewise, to enhance the applicability of the averaging BDFT on various flow conditions, flow analyses using CFD code were
performed focusing on design optimization of the BDFT. The calibration test results indicated that this averaging BDFT has
a linearity within 0.5 % in the Reynolds (Re) number range of above 10,000 where it is meaningful in terms of application.
The flow analyses results demonstrate a good linearity of the averaging BDFT with various design features. Therefore, averaging
BDFT can be applied for measurement of flow rates within a wide range of flow conditions.
This paper was recommended for publication in revised form by Associate Editor Won-Gu Joo
Kyoung-Ho Kang received his B.S. and M. S. degrees in Nuclear Engineering from SNU (Seoul National University), KOREA in 1993 and 1995,
respectively. He then received his Ph.D. degree in Nuclear and Quantum Engineering from KAIST (Korea Advanced Institute of
Science and Technology) in 2009. Dr. Kang is currently a senior researcher at the Korea Atomic Energy Research Institute in
Daejeon, Korea. Dr. Kang’s research interests include analysis and experiments for the nuclear safety, thermal hydraulics,
and experiments and modeling for the severe accidents.
Byong-Jo Yun received his B.S. degree in Nuclear Engineering from SNU (Seoul National University), KOREA in 1989. He then received his
M.S. and Ph.D. degrees from SNU in 1991 and 1996, respectively. Dr. Yun is currently a principal researcher at the Korea Atomic
Energy Research Institute in Daejeon, Korea. Dr. Yun’s research interests include analysis and experiments for the nuclear
safety, thermal hydraulics, two-phase flow, scaling analysis, and development of instrumentation for two-phase flow.
Dong-Jin Euh received his B.S. degree in Nuclear Engineering from Seoul University, Korea, in 1993. He then received his M.S. and Ph.D.
degrees from same university in 1995 and 2002, respectively. Dr. Euh is currently a researcher at thermal hydraulic safety
research department of Korea Atomic Energy Research Institute in Daejeon, Korea. Dr. Euh’s research interests include two-phase
thermal hydraulics in the Nuclear Systems and Fundamental Phenomena.
Won-Pil Baek has been working at KAERI as the general project manager (director) for development of nuclear thermalhydraulic experiment
and analysis technology since 2001. He received his B.S. degree in nuclear engineering from Seoul National University and
his M.S. and Ph.D. degrees from KAIST. In 1991–2000, he worked for KAIST as a researcher and research professor. Currently
he also serves as an executive editor of the Nuclear Engineering and Technology, an international journal of the Korean Nuclear Society. His research interests include critical heat flux, integral effect
tests, modeling, nuclear safety, and advanced reactor development. 相似文献
17.
Defect diagnostics of SUAV gas turbine engine using hybrid SVM-artificial neural network method 总被引:1,自引:0,他引:1
Sang-Myeong Lee Tae-Seong Roh Dong-Whan Choi 《Journal of Mechanical Science and Technology》2009,23(2):559-568
A hybrid method of an artificial neural network (ANN) combined with a support vector machine (SVM) has been developed for
the defect diagnostic system applied to the SUAV gas turbine engine. This method has been suggested to overcome the demerits
of the general ANN with the local minima problem and low classification accuracy in case of many nonlinear data. This hybrid
approach takes advantage of the reduction of learning data and converging time without any loss of estimation accuracy because
the SVM classifies the defect location and reduces the learning data range. The results of test data have shown that the hybrid
method is more reliable and suitable algorithm than the general ANN for the defect diagnosis of the gas turbine engine.
This paper was recommended for publication in revised form by Associate Editor Tong Seop Kim
Tae-Seong Roh received his B.S. and M.S. degrees in Aeronautical Engineering from Seoul National University in 1984 and 1986. He then went
on to receive his Ph.D. degree from Pennsylvania State University in 1995. Dr. Roh is currently a Professor at the department
of Aerospace Engineering at Inha University in Incheon, Korea. His research interests are in the area of combustion instabilities,
rocket and jet propulsion, interior ballistics, and gas turbine engine defect diagnostics.
Dong-Whan Choi received his B.S. degree in Aeronautical Engineering from Seoul National University in 1974. He then went on to receive his
M.S. and Ph.D. degrees from University of Washington in 1978 and 1983. Dr. Choi served three years as a President of the Korea
Aerospace Research Institute from 1999. He is currently a professor at the department of Aerospace Engineering at Inha University
in Incheon, Korea. His research interests are in the area of turbulence, jet propulsion, and gas turbine defect diagnostics. 相似文献
18.
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
19.
K. K. Viswanathan Kyung Su Kim Jang Hyun Lee Hee Seung Koh Jae Beom Lee 《Journal of Mechanical Science and Technology》2008,22(11):2062-2075
The spline function technique is used to analyze the vibration of multi-layered circular cylindrical shells with cross-ply
walls including first-order shear deformation theory. Both antisymmetric and symmetric cross-ply laminations are considered
in this analysis. The governing equilibrium equations are obtained in terms of displacement and rotational functions. A system
of coupled ordinary differential equations in terms of displacement and rotational functions are obtained by assuming the
solution in a separable form. These functions are approximated by using Bickley-type splines of suitable order to obtain the
generalized eigenvalue problem by applying point collocation techniques with appropriate boundary conditions. Parametric studies
are performed to analyze the frequency response of the shell with reference to the material properties, number of layers,
fiber orientation, thickness to radius ratio, length to radius ratio and circumferential node number. Reasonable agreement
is found with existing results obtained by FEM and other methods. Valuable results are presented as graphs and discussed.
This paper was recommended for publication in revised form by Associate Editor Maenghyo Cho
Dr. K. K. Viswanathan was born in 1962 in Vellore District, India. He received his B.Sc. in Mathematics from University of Madras and
M.Sc. in 1992 and Ph.D. in 1999 from Anna University, India. Later he was a Project Associate in Indian Institute of Science,
Bangalore. He served as lecturer in Crescent Engg. College and as Asst. Professor in SRM University, India. He did his post
doctoral research in Korea for three years. At present he serves as Professor in the Dept. of Naval Architecture, Inha University,
Incheon, Korea. His research areas of interest includes vibration of plates, shells and the application of numerical techniques
in Engineering problems.
Dr. Kyung Su Kim was born in Korea in 1954. He is a professor in Naval Architecture and Ocean Engineering at Inha University, Korea. He obtained
his B.Sc. degree in Naval Architecture and Ocean Engineering from Seoul National University, Korea, in 1981. He worked for
KR (Korean Register of Shipping) from 1981 to 1983. He obtained M.Sc. degree in Naval Architecture and Ocean Engineering in
1986, and Ph.D. degree in Structural Mechanics in 1991 from Rheinisch — Westfaelische Technische Hoch-schule Aachen, Germany.
From 1986 to 1992, he was a Post Doctoral Research Engineer of Engineering Research Institute at Rheinisch — Westfaelische
Technische Hochschule Aachen. He was appointed as a professor of Inha University, Korea, in 1994. His major area of study
is Impact and Fatigue Fracture.
Dr. Jang Hyun Lee was born in Korea in 1969. Currently, he is an Assistant professor of the Department of Naval Architecture and Ocean Engineering
at Inha University, Korea. He obtained his B.Sc., M.Sc. and Ph.D. degrees in Naval Architecture and Ocean Engineering from
Seoul National University, Korea, in 1993, 1995 and 1999 respectively. From 1999 to 2002, he was a Post Doctoral Research
Engineer of Engineering Research Institute at Seoul National University. He joined the Inha University in 2005 after holding
the Chief Technology Officer at Xinnos for four years. His research interests include press forming of thick plates and shells,
computational welding mechanics and Product Lifecycle Management. 相似文献
20.
Murali Subramaniyam Sangho Park Sung-il Choi Jun-Yeob Song Jong Kweon Park 《Journal of Mechanical Science and Technology》2009,23(2):498-503
The micro factory, a miniature manufacturing system, is a means of achieving higher throughput with minimal space, and minimal
consumption of energy and resources by downsizing of production processes. Even though, a micro factory is able to perform
whole manufacturing processes like the macro factory, the possibility of improving its manufacturing efficiency has not been
considered enough. In this paper, an efficiency index is proposed to calculate the efficiency of the micro factory to manufacture
a micro pump. The efficiency index has been proposed based on efficiency definition with input and output parameters of the
system. Input parameters include cost of system, processing time and energy. Output parameters represent number of product
manufactured from the microfactory. Cost of the system has been categorized by micro assembly machine cost, cost of resources,
manipulators’ cost, manufacturing space value, and human operators. Processing time has been categorized by assembly time
and material handling time.
This paper was recommended for publication in revised form by Associate Editor Dae-Eun Kim
Murali Subramaniyam received his B.E. and M.Tech. from India in 2003 and 2005, respectively. Currently, he is pursuing his Ph.D. in Me-chanical
Design Engineering under Brain Korea 21 program fellowship at CNU (Chungnam National University), Korea. Also he is working
as a research associate in LID (Laboratory of Intelligent Design and manufacturing) at CNU, under Professor Sangho Park. His
research interests include CAD/CAM (Computer Aided Design/ Computer Aided Manufac-turing), Computer Integrated Manufacturing,
Rapid Prototyping and DHM (Digital Human Modeling).
Sangho Park is currently a Professor in Mechanical Design Engineering at CNU. He received his B.S., M.S. and Ph.D. from Seoul National
University, Korea in 1988, 1990 and 1995 respectively. He was a Senior Research Scientist at ETRI (Electronics and Telecommunications
Research Institute), Korea. His areas of expertise and research interest includes CAD/CAM, Virtual Reality, DHM and Micro
Assembly. LID (renamed from CAD/CAM) is doing research under his advice.
Sung-il Choi received a B.S. form Konyang University in 1995, Korea. He then received an M.S. from CNU in 1997. Currently, he is pursuing
his Ph.D. in Mechanical Design Engineering at CNU. He was a researcher at ETRI. His research intersts include the areas of
development of CAD interface, virtual simulation, 3D Web solutions, geometric modelling, micro-assembly, and application of
distributed environment.
Jun-Yeob Song is a Team Leader in the IT Machinery Research Team, Korea Institute of Machinery and Materials, Korea. Also, He is a Chief
of National Research Laboratory on Knowledge Evolution based Manufacturing Devices. He received a Ph. D. from the School of
Industrial Engineering at Busan National University in 2001. He has extensive experience in design & control of automation
and autonomous manufacturing systems, and reliability engineering. In recent years, Dr. Song’s research interests are in the
area of micro assembly, bonding, and multi chip packaging (MCP).
Jong-Kweon Park received a B.S. degree in Mechanical Engineering from Inha University in 1977. He then received M.S. and Ph.D. degrees in
mechanical engineering from Changwon National University in 1993 and 1997. Dr. Park is currently a principal research at Korea
Institute of Machinery and Materials in Daejeon, Korea. His current research areas are cutting dynamics and control, structural
dynamics and optimization, ultra precision machining systems, micro/nano manufacturing systems, and design and evaluation
of machine tool systems. He is currently a project leader for the project, “Development of Microfactory System Technologies
for Next Generation.” 相似文献