THD Effects of Static Performance Characteristics of Infinitely Wide Turbulent Journal Bearings |
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| Authors: | SHIUH-HWA SHYU FULI LI YEAU-REN JENG WEI-REN LEE SHENG-JII HSIEH |
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| 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 |
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| 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. |
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| Keywords: | Journal Bearings Legendre Collocation Turbulent Flow Isoviscous Thermohydrodynamics Load Capacity Friction Coefficient Attitude Angle |
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