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对油膜轴承进行计算时,空化模型的选择是决定计算精度的重要因素之一。目前常用的润滑油空化模型一般基于实验得到的油膜压力分布而提出,该文结合油膜轴承润滑油空化的机理提出了一种新的基于空气溶解度的空化模型,使用该模型对某径向轴承进行计算流体力学(computational fluid dynamics,CFD)计算,在不同的偏心率下的计算结果均与实验值吻合,计算精度与Half-Sommerfeld空化边界条件相比有显著的提高,并且该模型具有很好的算法稳定性。
When calculating the oil film bearing, the selection of the cavitation model is one of the important factors that determine the accuracy of the calculation. At present, the commonly used cavitation model of lubricating oil is generally proposed based on the experimentally obtained oil film pressure distribution. In this paper, a new cavitation model based on air solubility is proposed based on the cavitation mechanism of oil film bearing lubricant. Computation of computational fluid dynamics (CFD) to the bearings, the calculated results at different eccentricities are consistent with the experimental values, and the computational accuracy is significantly improved compared to the Half-Sommerfeld cavitation boundary conditions. And the model Has a good algorithm stability.