凸型テクスチャを用いた摺動面における流体潤滑特性に対するキャビテーションの影響に関する数値的研究

抄録

In this study, simulations were performed to reproduce a sliding surface with a convex texture in two dimensions. The effects of cavitation on sliding surfaces were investigated by simulating various texture geometries. The texture geometry was based on a rectangular shape and different size chamfers were added in the downstream side. A moving wall accelerating at 1 m/s2 on the top surface and a fixed wall with a convex texture on the bottom surface were addopted for boundary conditions. The upstream and downstream boundary conditions were fixed at a gauge pressure of 0 Pa. The gauge vapor pressure of the lubricant was set to -1325 Pa, below which cavitation would occur. The Schnerr and Sauer model was used to reproduce cavitation. To compare the effects of cavitation, calculations were also performed for single-phase flow without the occurrence of cavitation. As a result, it was clarified that the texture shape affects the occurrence of cavitation, and it affects the sliding performance.