Influence of location, number and shape of corrugations in slider bearings

Abstract

The effects of location and shape of a localised corrugation on the performance of a fixed inclined slider bearing are investigated numerically, using a finite element method. It is shown that normal force increases uniformly as the corrugation is relocated downstream in the bearing gap, from being less than that of the smooth walled case to being higher, while flow rate decreases, also uniformly. Corrugation with the shape of rectangle waves produce largest changes in pressure distribution, normal force and flow rate, relative to the smooth walled case. This is followed by sine-wave corrugation, whereas triangle-wave corrugation produces smallest changes. The number of corrugation waves produces similar, but weaker, changes in normal force and flow rate, to the corrugation volume, when this is used as a parameter characterizing corrugation shape.

An analytical approach for analysis and optimisation of slider bearings with infinite width parallel textures

“…Using a commercial CFD code, Cupillard [18] investigated the effect of introducing a textured surface on the performance of a journal bearing and the mechanism of pressure buildup due to existence of textures in an inclined slider bearing. In addition, the influence of different surface corrugation shapes of triangular, sinusoidal and rectangular and their location on the performance of fixed inclined slider bearings has been studied by Huynh and Loe [19] under non-isothermal flow conditions utilising FEM. Of the three studied corrugation shapes, it was found that rectangle waves produce largest changes in the pressure distribution, normal force and flow rate relative to the smooth walled cases.…”