摘要
非稳态热弹流润滑一直是研究的热点和难点,针对变卷吸速度的点接触热弹性流体动力润滑问题,利用多重网格积分法,得到变卷吸速度的点接触热弹性流体动力润滑完全数值解。结果表明:卷吸速度的变化会引起油膜压力、膜厚和温度的变化;当卷吸速度变化到一定值时,在接触区会产生油膜的凹陷;凹陷的产生可用“温度-粘度楔”机制解释。
The study of non-steady state thermal elastohydrodynamic lubrication is always important and difficult. Based on the multilevel techniques, a full numerical solution was obtained for thermal elastohydrodynamic lubrication point contact with time-dependent entrainment velocities. Results show that pressure, film thickness and temperature are changed with variation of the entrainment velocity;film profiles featuring a dimple can be formed in the contact zone when the entrainment velocity exceeds a certain level;the formation of dimple can be explained by the temperature-viscosity-wedge effect.
出处
《润滑与密封》
CAS
CSCD
北大核心
2007年第1期62-67,共6页
Lubrication Engineering
基金
山东省自然科学基金项目(Z2003F01)
青岛市科技局基金项目(03-2-JZP-15)
关键词
热弹性流体动力润滑
点接触
时变效应
卷吸速度
凹陷
thermal elastohydrodynamic lubrication
point contact
transient effect
entrainment velocity
dimple
