Comparison between steady-state characteristics of isotropic and anisotropic doubled-layered porous journal bearings under coupled stress lubrication

International Conference on Mechanical, Materials and Renewable Energy

机械制造;材料科学;能源学

Some, Shitendu^1 ; Kumar Guha, Sisir^1

Department of Mechanical Engineering, Indian Institute of Engineering Science and Technology, Shibpur, India^1

关键词: Coupled stress;    Film interfaces;    Governing equations;    Modified Reynolds equation;    Polar additives;    Porous journal bearings;    Steady state characteristics;    Steady state performance;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/377/1/012106/pdf
DOI  :  10.1088/1757-899X/377/1/012106

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

A theoretical comparison between the steady-state characteristics of isotropic and anisotropic finite hydrostatic double-layered porous journal bearings dealing with the effects of slip flow at the fine porous layer-film interface and percolation of additives into pores under the coupled stress fluid lubrication is presented. Based on the Beavers-Joseph's criterion for slip flow, the modified Reynolds equation applicable to finite porous journal bearings lubricated with coupled stress fluids have been derived. The governing equations for flow in the coarse and fine layers of porous medium incorporating the percolation of polar additives of lubricant and the modified Reynolds equation are solved simultaneously using finite difference method satisfying appropriate boundary conditions to obtain the steady-state performance characteristics for both isotropic and anisotropic porous bearing. The comparisons between isotropic and anisotropic doubled-layered porous bearings for various steady-state characteristics are exhibited in the form of graphs which may be useful for design of such bearings.