S114034 CFDを用いた流体潤滑下での表面テクスチャによる異物のトラップに関する研究([S11403]機素潤滑設計部門第17回卒業研究コンテスト(3))

概要

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Surface texturing holds promise in improving sliding properties. Some effects of surface texturing is known such as canceling negative pressure in the textures by the generation of cavitation, supplying lubricant to surfaces, improving running-in processes and trapping exogenous materials. Although, the mechanisms of these effects are not known precisely since it is difficult to perform an in-situ observation of the sliding surfaces. Recently, Computational Fluid Dynamics is used to clarify the mechanisms of surface texturing effects under hydrodynamic lubrication. Numerical studies about the effect of canceling negative pressure are well-researched. However, the effect of trapping exogenous materials and supplying lubricant to surfaces has not been researched yet. In this report, we focused on the effect of trapping exogenous materials. The objective of this study is to find appropriate figures of textures to trap exogenous materials. Navier-Stokes equation was used to calculate the flow around the textures. From simulation results, we obtained two conclusions; trap of particles can be seen when lubricant circulate in the textures, and the ability of trapping particles depend on the aspect ratio of the textures.
一般社団法人日本機械学会の論文
2011-09-11