THD Effects of Static Performance Characteristics of Infinitely Wide Turbulent Journal Bearings
| Autor: | Sheng Jii Hsieh, Yeau-Ren Jeng, Wei Ren Lee, Shiuh Hwa Shyu, Fuli Li |
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| Rok vydání: | 2010 |
| Předmět: |
Total harmonic distortion
Engineering drawing Computer simulation Differential equation Turbulence Mechanical Engineering media_common.quotation_subject Reynolds number Surfaces and Interfaces Mechanics Surfaces Coatings and Films symbols.namesake Mechanics of Materials Range (statistics) symbols Eccentricity (behavior) Lubricant media_common Mathematics |
| Zdroj: | Tribology Transactions. 53:948-956 |
| ISSN: | 1547-397X 1040-2004 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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