首页 | 本学科首页   官方微博 | 高级检索  
     


THD Effects of Static Performance Characteristics of Infinitely Wide Turbulent Journal Bearings
Authors:SHIUH-HWA SHYU  FULI LI  YEAU-REN JENG  WEI-REN LEE  SHENG-JII HSIEH
Affiliation:1. Graduate School of Opto-Mechatronics and Materials , WuFeng University, MingHsiung , ChiaYi , Taiwan , 621 , ROC;2. Department of Mechanical Engineering , National Chung Cheng University, MingHsiung , ChiaYi , Taiwan , 621 , ROC;3. Department of Aeronautics and Astronautics , National Cheng Kung University , Tainan , Taiwan , 701 , ROC
Abstract:Formulas for static parameters were found for infinitely wide turbulent full journal bearings that correlate either load capacity or friction coefficient for thermohydrodynamics (THD) effects in terms of a single THD parameter. The database was built by numerical simulation of turbulent liquid lubricant flows with various eccentricity ratios in a wide range of the Reynolds number for both isoviscous and THD cases. The least-squares method was applied to the groups of parameters yielding the formulas of load capacity, friction coefficient, and attitude angle. The isoviscous attitude angle was fitted as a function of the maximum-to-minimum film thickness ratio, and the variation of attitude angle due to THD is linearly dependent on the THD-to-isoviscous load capacity ratio. With the formulas provided in this study, designers can quickly determine static parameters of turbulent journal bearings without the burden of labor-intensive numerical computation of the governing differential equations.
Keywords:Journal Bearings  Legendre Collocation  Turbulent Flow  Isoviscous  Thermohydrodynamics  Load Capacity  Friction Coefficient  Attitude Angle
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号