Abstract

This article presents an efficient cavitation model for fluid film bearings, considering both gaseous and vaporous cavitation. This work presents a modification of Elrod’s cavitation algorithm, where the bulk fluid is similarly considered to be a mixture of liquid and bubbles, without the need for a switch function. By solving for properties of the bulk fluid in the film, the distribution of the gaseous, vapor, and liquid states is captured without detailed tracking of bubble dynamics, as well as the variable compressibility of the bulk fluid in both ruptured and full film regions. The model developed is implemented in a numerical algorithm to solve the compressible Reynolds equation. Finally, the approach developed is applied to test cases to demonstrate its potential, as well as for comparison with Elrod’s algorithm.

摘要

本文提出了一种考虑到气态和气态气蚀的高效液膜轴承气蚀模型。这项工作提出了对Elrod的气蚀算法的修改，其中类似地认为散装流体是液体和气泡的混合物，不需要开关功能。通过解决薄膜中本体流体的特性，可以捕获气态，蒸气和液体状态的分布，而无需详细跟踪气泡动力学以及在破裂和整个薄膜区域中本体流体的可变可压缩性。所开发的模型在数值算法中实现，以解决可压缩的雷诺方程。最后，将开发的方法应用于测试案例以证明其潜力，并与Elrod算法进行比较。