Theoretical Investigation of Texture Geometry on the Performance of Partial Textured Hydrodynamic Journal Bearing under Turbulent Regime

Abstract

The purpose of this work is to investigate the effect of cylindrical, kite and triangular shaped dimples on static, dynamic and stability performance of partial textured hydrodynamic journal bearing working under turbulent regime. The texture geometry significantly affects the performance of a journal bearing in terms of better load carrying capacity, frictional, stiffness, damping and stability parameter. The increasing demand of high rotor speed necessitates to study the influence of texture geometrical parameters under turbulent regime for which cavitation is commonly observed phenomenon. Three different partial textured journal bearings having cylindrical, kite and triangular shaped dimples on their surfaces are undertaken. The dimensionless Reynolds equation for Newtonian iso-viscous compressible lubricant is modified for turbulence and mass conservation for both cavitated/non-cavitated zone throughout the solution domain. Using linear complementarity approach (LCP) the equation is discretised into linear algebraic equation by using Finite Element Method. The static and dynamic parameters are computed with various dimple depths at fixed eccentricity ratio.

Keywords

• linear complimentarity approach
• texture geometry
• turbulence
• partial textured bearing
• fem
• reynolds number