Numerical simulation of piston ring in the mixed lubrication

作者：Wang, WH^*; Hu, YH; Wang, H; Liu, YH

来源：Science in China Series A-Mathematics, 2001, 44: 34-39.

• mixed lubrication
• elastohydrodynamic lubrication
• piston ring
• surface roughness

Piston and piston ring lubrication is a factor that strongly affects the performance of the reciprocating internal combustion engine. When the oil film thickness becomes smaller than a certain value, depending upon the roughness of the surfaces in contact, mixed lubrication has to be considered. 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 approach assuming that the pressure distribution obeys Reynolds equation in hydrodynamic lubrication regions while in asperities contact regions, the contact pressure can be obtained through the so-called reduced Reynolds equation. The computation experience shows the unified equation system is stable and can deal with severe operating conditions.

• 出版日期2001-8
• 单位清华大学