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A numerical model for design and optimization of surface textures for tilting pad thrust bearings

机译:摆式推力轴承表面纹理设计与优化的数值模型

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摘要

A numerical model based on the Reynolds equation to study textured tilting pad thrust bearings considering mass-conserving cavitation and thermal effects is presented. A non-uniform and adaptive finite volume method is utilized and two methods are compared and selected regarding their efficiency in handling discontinuities; specifically placing additional nodes closely around discontinuities and directly incorporating discontinuities in the discrete system. Multithreading is applied to improve the computational performance and three root-finding methods to evaluate the bearing equilibrium are compared; namely Newton-Raphson method, Broyden's method with Sherman-Morrison formula and a continuation approach with fourth-order Runge-Kutta method. Results from the equivalent untextured bearing are utilized to accelerate the computation of the textured bearing and results are validated by comparison with CFD data.
机译:提出了一种基于雷诺方程的数值模型,该模型研究了兼顾质量保持的气蚀和热效应的织构可倾瓦止推轴承。利用非均匀自适应有限体积方法,比较和选择两种方法的不连续性处理效率;特别是将不连续的节点紧紧地放置在不连续点附近,并直接将不连续点合并到离散系统中。应用多线程来提高计算性能,并比较了三种评估轴承平衡的根本发现方法;即牛顿-拉夫森法,具有谢尔曼-莫里森公式的布罗伊登法和具有四阶龙格-库塔法的延续法。等效无纹理轴承的结果可用于加速纹理轴承的计算,并通过与CFD数据进行比较来验证结果。

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