| 摘要: |
| 为了研究水润滑高分子材料轴承的微观界面的流场特性，以最小膜厚处单个微凹体中的流场作为研究对象，建立了单个微凹体流动模型。采用多松弛格子玻尔兹曼方法MRT-LBM （Multi-relaxation time lattice Boltzmann method）对单个微凹体内的流体流动问题进行数值模拟。研究了流场中速度的变化规律，以及流场内流线分布随雷诺数的变化规律。结果表明，当雷诺数较低时（模型中Re=200），流场处于稳定性流动状态；当雷诺数达到一定程度时（模型中Re=4000），流场处于周期流动状态；当雷诺数再升高时，流场处于紊流运动状态。 |
| 关键词: 轴承 润滑 微观界面 雷诺数 流场特性 数值模拟 |
| DOI：10.13675/j.cnki.tjjs.200112 |
| 分类号:O35 |
| 基金项目:国家自然科学基金（11672178）。 |
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| Numerical Simulation of Flow Field Characteristics of Microscopic Interface of Water-Lubricated Bearing |
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JIAO Chun-xiao1, LENG Zi-jun1, TA Na1, RAO Zhu-shi1,2
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1.State Key Laboratory of Mechanical System and Vibration，School of Mechanical Engineering， Shanghai Jiao Tong University，Shanghai 200240，China;2.Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration，Shanghai 200240，China
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| Abstract: |
| To investigate the flow field characteristics at the microscopic interface of water-lubricated polymer bearings， the flow field in a single microscopic dimple at the minimum film thickness was taken as the research object， and the flow model in a single microscopic dimple was established. MRT-LBM （multi-relaxation time lattice Boltzmann method） was used to simulate the fluid flow in the single microscopic dimple. The variations of velocity and streamline distribution with Reynolds number in flow field were analyzed. The results show that， when Reynolds number is low （model in this paper Re=200）， the flow field is in a stable flow state. When Reynolds number reaches a certain level （model in this paper Re=4000）， the flow field is in a periodic flow state. When Reynolds number increases further， the flow field is in turbulent motion. |
| Key words: Bearings Lubricating Microscopic interface Reynolds number Fluid field characteristic Numerical simulation |
