摘要
面向非牛顿热弹性流体动力润滑,定义了一个能量参数,它综合考虑了尺度效应、非牛顿效应和热效应。经过数值解验证了该参数的独立性,通过改变尺度讨论了该参数的变化对选择弹流模型的影响。结果表明:当该参数较小时,热效应可以忽略,牛顿流体热模型和Eyring流体热模型可分别用对应的等温模型来替代;而当该参数增大到一定值时,非牛顿效应可以忽略而热效应则必须加以考虑,此时Eyring流体热模型可用牛顿流体热模型来替代。
An energy parameter was introduced into the study of non-Newtonian thermal elastohydrodynamic lubrication. This parameter takes into account comprehensively the size effect, non-Newtonian effect, and thermal effect. The independence of this parameter was validated through numerical solutions. The influence of the parameter on the selection of mathe- matical model was discussed by changing the size of the conjunction. Numerical results indicate that, when the energy parameter is small enough, thermal effect can be ignored, hence the thermal Newtonian and non-Newtonian models can be re- placed by the corresponding isothermal models. When this parameter increases to a certain degree, the non-Newtonian effect can be ignored but the thermal effect has to be considered, thus the thermal non-Newtonian model can be replaced by the thermal Newtonian model.
出处
《润滑与密封》
CAS
CSCD
北大核心
2010年第1期13-16,共4页
Lubrication Engineering
基金
国家自然科学基金资助项目(50575108)
总装基金资助项目(9140A14070508BQ06)
