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| 基于质量守恒边界条件的液压缸织构表面空化模型 |
| Cavitation model of the textured cylinder based on mass conservation boundary conditions |
| 投稿时间：2017-03-16 |
| DOI： |
| 中文关键词: 液压缸 表面织构 空化模型 质量守恒边界条件 |
| 英文关键词: hydraulic cylinder textured surface cavitation model mass conservation boundary conditions |
| 基金项目:国家自然科学基金资助项目(51475338,51405350). |
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| 中文摘要: |
| 传统的雷诺边界条件没有考虑到微凹坑织构中存在的空化现象,较难准确预测织构化表面的润滑特性。本文以液压缸缸筒-活塞摩擦副为研究对象,基于质量守恒的边界条件,建立均匀分布的微凹坑织构表面油膜压力与变密度两者之间的空化数学解析模型,采用中差分模型和迎风算法进行数值离散,得到摩擦副中油膜的压力分布以及空化生成的位置。FLUENT仿真结果验证了该空化模型的有效性。 |
| 英文摘要: |
| The traditional Reynolds boundary conditions fail to consider the cavitation phenomenon in the pits of micro-texture and thus cannot accurately predict lubricating property of the micro-textured surface. In this paper, the hydraulic cylinder-piston friction pair was studied based on the mass conservation boundary conditions. The analytic mathematical model of cavitation between oil film pressure and variable density on the textured surface with uniformly-distributed pits was established. The finite difference model and the upwind scheme were used for numerical discretization to obtain the pressure distribution and the cavitation location. FLUENT simulation has proven the effectiveness of the cavitation model. |
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