Influence of Texture Geometry on the Hydrodynamic Performances of Parallel Bearings

Influence of superoleophobic layer on the lubrication performance of partially textured bearing including cavitation

“…It indicates that there is an optimal value of cell number leading to the maximum load support. This result is comparable to the work of Gherca et al [9] who investigated the effects of texture design, within the frame of a general texture pattern, taking the cavitation effect into account. Here, for optimal texture configuration, again, superoleophobic layer can lead to the highest load support as seen in Figures 2 and 3, respectively, which have benefit for the improvement of the bearing performance.…”

“…From physical point of view, it means that the cavitation occurs and leads to low pressure generation, especially when pocket depth is low. Introducing the superoleophobic layer at the leading edge of the contact as suggested in the present study makes the occurence of the cavitation able to be prevented, and therefore the mechanism of the pressure generation identified by Gherca et al [9] as "inlet suction" has been replaced with the mechanism of "slip effect". This phenomena is not found when the superoleophobic layer is not introduced in the bearing.…”

“…Consequently, the increase in the load support is highlighted. It is pointed out that for the case of the textured bearing without superoleophobic layer, Gherca et al [9] showed that especially at the leading edge of the contact area, the hydrodynamic pressure drops to nearly zero. From physical point of view, it means that the cavitation occurs and leads to low pressure generation, especially when pocket depth is low.…”

“…In the present study, the load support is calculated through the integration of the hydrodynamic pressure field using [9]:…”

“…In this study, dealing with the derivation of modified Reynolds equation the boundary conditions for cavitation employed here are based on the JFO (Jakobsson-Floberg-Olsson) theory to model the rupture zone on the textured surface more accurately [7,8]. The methodology used to describe the cavitation phenomena is similar to the work of Gherca et al [9]. All parameters and the range in which they are varied for all cases investigated in the present study are summarized in Table 1.…”