Experimental and Numerical Analysis of Conical Shape Hydrodynamic Journal Bearing With Partial Texturing

In this paper, the numerical and experimental analysis is carried out for investigating the performance characteristics of conical shape hydrodynamic journal bearing (CSHJB) through partial texturing (ellipsoidal shape dimples). The numerical analysis is carried out using the thin film flow physics of COMSOL Multiphysics 5.0. The ellipsoidal dimples are developed using photochemical machining. The influence of 00-900 and 900-1800 partial texturing on the bearing performance parameters viz. fluid film pressure (FFP), load carrying capacity (LCC) and coefficient of friction (COF) is studied numerically. Bearing surface with partial texturing along 900 -1800 region results in 42.08 % enhancement in maximum FFP whereas 42.24 % enhancement in LCC as compared with smooth surface CSHJB with maximum 52.20% reduction of COF.