Direct Observation of Cavitation Phenomenon and Hydrodynamic Lubrication Analysis of Textured Surfaces
Direct Observation of Cavitation Phenomenon and Hydrodynamic Lubrication Analysis of Textured Surfaces
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DOI：
10.1007/s11249-012-9935-6
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发表时间：
2012-05-01
影响因子：
3.2
通讯作者：
Meng, Yonggang
中科院分区：
文献类型：
--
作者：
Zhang, Jinyu;Meng, Yonggang
在平行推力轴承中，当一个有纹理的环相对另一个无纹理的环旋转时，由于局部压力下降，液体润滑剂可能会在有纹理的表面上的凹坑或凹槽的分叉区发生空化。雷诺模型和Jakobson-Floberg-Olsson(JFO)模型是流体动力润滑理论中广泛使用的两种空化模型，前者缺乏质量守恒，而后者加强了质量守恒。为了考察这两种模型在具有表面纹理的平行推力轴承的流体动力润滑分析中的适用性，对平行推力轴承的沟槽空化区形态、摩擦系数和轴承间隙进行了实验和仿真比较。结果表明，稳态下观测到的空化形态与JFO模型的预测结果相比，更接近雷诺模型的预测结果。
When a textured ring rotates relatively against the other texture-free ring in a parallel thrust bearing, cavitation of liquid lubricant may occur in the divergent zones of the dimples or grooves on the textured surface due to local pressure drops. The Reynolds and Jakobsson-Floberg-Olsson (JFO) models are two widely used cavitation models in hydrodynamic lubrication theory, where the former lacks mass conservation while the latter enforces it. In order to investigate the applicability of the two models to the hydrodynamic lubrication analysis of parallel thrust bearings with surface textures, comparison between experiment and simulation results has been carried out on parallel thrust bearings in terms of cavitation zone morphology in a groove, friction coefficient, and bearing clearance. The results have shown that the observed cavitation morphology in steady state is more similar to the prediction from the JFO model than that from the Reynolds model.