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利用一种新的迭代算法 ,分析了高速发动机油膜惯性对活塞裙润滑特性的影响 .该迭代方法是利用有限元法和差分法交替求解Navier Stocks方程和雷诺方程 ,据此导出了适用于高速发动机活塞裙的润滑计算的混和润滑雷诺模型 .新的模型借助惯性系数 ,引入了油膜惯性项 ;同时给出求解含有油膜惯性项的迭代步骤和有限元表达式。计算结果表明 :随着惯性系数和活塞裙的长径比的不同 ,油膜惯性会对油膜的摩擦力、压力和承载力产生不同的影响 ,这种影响对承载力尤为明显 .该润滑模型也可用于中、低速发动机的活塞裙润滑计算以及不计入惯性项 (惯性系数置为零 )的某些润滑问题求解 .
A new iterative algorithm is used to analyze the effect of the inertia of the high-speed engine oil film on the lubrication characteristics of the piston skirt. The iterative method is to use the finite element method and the differential method to solve the Navier Stocks equation and the Reynolds equation alternately. Piston Skirts Lubrication Compounded Hybrid Lubrication Renault Model The new model introduces the inertia of the oil film by means of the inertia coefficient and gives the iterative steps and finite element expressions for solving the oil film inertia term. The results show that with the difference of the inertia coefficient and the aspect ratio of the piston skirt, the oil film inertia will exert different influences on the friction, pressure and bearing capacity of the oil film, especially for the bearing capacity.The lubrication model is also available Calculation of piston skirt lubrication for medium- and low-speed engines and some lubrication problems that do not account for the inertia term (inertia coefficient is set to zero).