Non-Newtonian Thermal Analyses of Point EHL Contacts Using the Eyring Model
Non-Newtonian Thermal Analyses of Point EHL Contacts Using the Eyring Model
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DOI：
10.1115/1.1843161
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发表时间：
2005
影响因子：
2.5
通讯作者：
Xiaolin Liu;M. Jiang;P. Yang;M. Kaneta
中科院分区：
文献类型：
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作者：
Xiaolin Liu;M. Jiang;P. Yang;M. Kaneta
针对点接触中的热弹流体动力润滑（EHL）问题开发了一种非牛顿数值求解系统。 Eyring 流变学模型已用于描述润滑剂的非牛顿流动。已为艾林流体定义了有效粘度。当牛顿流体的粘度被有效粘度代替时，牛顿求解器可以很容易地应用于非牛顿问题。提出了一种测定有效粘度的新技术。给出了传统点接触和正交叉圆柱接触问题的数值解，并讨论了艾林流体的夹带速度、载荷、滑滚比和特征剪切应力对润滑性能的影响。结果表明，非牛顿热 EHL 理论预测了更真实的薄膜温度和牵引系数。
A non-Newtonian numerical solution system for the thermal elastohydrodynamic lubrication (EHL) problems in point contacts has been developed. The Eyring rheology model has been used to describe the non-Newtonian flow of the lubricant. An effective viscosity has been defined for the Eyring fluid. The Newtonian solver can be applied easily to the non-Newtonian problems when the viscosity of the Newtonian fluid is replaced by the effective viscosity. A novel technique for the determination of the effective viscosity is proposed. Numerical solutions for the conventional point contact and normally crossing cylinders contact problems are presented and the effects of the entraining velocity, the load, the slide-roll ratio, and the characteristic shear stress of the Eyring fluid on the lubricating performance are discussed. The results indicate that the non-Newtonian thermal EHL theory predicts more realistic film temperatures and traction coefficients.