Analysis of a double layer porous hybrid journal bearing considering the combined influence of wear and non-Newtonian behaviour of lubricant

Use of porous materials in fluid film is well established so as to make more uniform distribution of pressure along the journal surface. The work presented in this paper deals with theoretical examination into the effect of worn bearing surface on the behaviour of a hybrid double layer porous journal bearing system (DLPJBS) operating with power-law lubricants. The governing equation for the flow of non-Newtonian lubricant in the bearing porous clearance space is solved by using the FEM. The effects of nonNewtonian lubricant on the bearing characteristics of a worn bearing have been studied. Findings of this study indicates that the hybrid DLPJBS operating under non-Newtonian lubricant offers enhanced values of (h) over bar (min), (omega) over bar xth and rotor dynamic coefficients (stiffness and damping coefficients).

Automated summary

This paper explores the theoretical examination of the effect of worn bearing surfaces on the behavior of a hybrid double layer porous journal bearing system operating with power-law lubricants. The study finds that the hybrid DLPJBS operating under non-Newtonian lubricants offers enhanced values of certain dynamic coefficients. The governing equations for non-Newtonian lubricant flow in bearing porous clearance space are solved using the FEM method.