文章基本信息

标题：Recirculation Flow and Pressure Distributions in a Rayleigh Step Bearing
本地全文：下载
作者：Feng Shen ; Cheng-Jin Yan ; Jian-Feng Dai 等
期刊名称：Advances in Tribology
印刷版ISSN：1687-5915
电子版ISSN：1687-5923
出版年度：2018
卷号：2018
DOI：10.1155/2018/9480636
出版社：Hindawi Publishing Corporation
摘要：Flow characteristics in the Rayleigh step slider bearing with infinite width have been studied using both analytical and numerical methods. The conservation equations of mass and momentum were solved utilizing a finite volume approach and the whole flow field was simulated. More detailed information about the flow patterns and pressure distributions neglected by the Reynolds lubrication equation has been obtained, such as jumping phenomenon around a Rayleigh step, vortex structure, and shear stress distribution. The pressure distribution of the Rayleigh step bearing with optimum geometry has been numerically simulated and the results obtained agreed with the analytical solution of the classical Reynolds lubrication equation. The simulation results show that the maximum pressure of the flow field is at the step tip not on the lower surface and the increment of the strain rate from Navier-Stokes equation is approximately 49 percent greater than that from Reynolds theory at the step tip. It is also shown that the position of the maximum pressure of the lower surface is a little less than the length of the first region. These results neglected by the Reynolds lubrication equation are important for designing a bearing.