3D fluid-thermal-structural interaction simulations for a small tilting pad thrust bearing
首发时间:2015-11-19
Abstract:Thrust bearing lubrication involves fluid-thermal-structural interactions between the oil film, the pad and the collar. Conventional solutions simultaneously solve the Reynolds, energy, film thickness, viscosity-temperature, solid heat conduction and solid deformation equations with many assumptions and simplifications. This study used the 3D fluid-structure interaction technique to investigate the thermal-elastic-dynamic lubrication in a small thrust bearing for a steady-state operation without those assumptions. Pressure, temperature, thickness distributions of the oil film and the heat transfer coefficients on the pad are analyzed. The results show that this technique combining CFD and FEM models can accurately model thrust bearing lubrication problem and explain the lubrication mechanism better.
keywords: tilting pad thrust bearing fluid-thermal-solid interaction CFD FEM
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小型可倾瓦推力轴承流固热耦合三维数值模拟
摘要:推力轴承润滑涉及到油膜、瓦块和镜板间的流固热耦合问题。传统的求解方法在很多简化和假设的基础上,同时求解雷诺方程、能量方程、油膜厚度方程、粘温方程、固体热传导方程和固体弹性平衡方程。本文采用三维流固耦合方法研究了小型可倾瓦推力轴承稳态工况下的热弹流润滑特性,模型避免了传统方法中的一些假设。讨论了油膜的压力、温度、厚度分布和瓦块的换热特性。结果表明,流固耦合方法结合CFD和FEM模型,能够精确地计算推力轴承的润滑问题,同时可以更好的揭示其润滑机理。
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No.4661472111001214****
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