Numerical simulation of piston ring in the mixed lubrication

作     者：WANG Wenzhong HU Yuanzhong WANG Hui LIU Yuchuan State Key Laboratory of Tribology, Tsinghua University Beijing 10O084, China 

作者机构：Tsing Hua Univ State Key Lab Tribol Beijing 100084 Peoples R China 

出 版 物：《Science China Mathematics》 (中国科学：数学（英文版）)

年 卷 期：2001年第44卷第S1期

页      面：34-39页

学科分类：08[工学] 080203[工学-机械设计及理论] 0802[工学-机械工程] 

主　　题：mixed lubrication elastohydrodynamic lubrication piston ring surface roughness 

摘      要：Piston and piston ring lubrication is a factor that strongly affects the performance of thereciprocating internal combustion engine. When the oil film thickness becomes smaller than a cer-tain value, depending upon the roughness of the surfaces in contact, mixed lubrication has to beconsidered. This paper analyzes the lubrication of piston ring and predicts pressure distribution,lubricant film thickness and surface deformation. The work is based on a unified numerical ap-proach assuming that the pressure distribution obeys Reynolds equation in hydrodynamic lubrica-tion regions while in asperities contact regions, the contact pressure can be obtained through theso-called reduced Reynolds equation. The computation experience shows the unified equationsystem is stable and can deal with severe operating conditions.