Title: Studies on the influence of surface texture on the performance of hydrodynamic journal bearing using power law model

Authors: S. Kango, Rajesh Kumar Sharma

Addresses: Mechanical Engineering Department, National Institute of Technology, Hamirpur, HP 177005, India. ' Mechanical Engineering Department, National Institute of Technology, Hamirpur, HP 177005, India

Abstract: The present study investigates the combined influence of surface texture, using sinusoidal, positive full and half wave roughness (transverse and longitudinal roughness) and non-Newtonian lubricants, obeying power law model on finite journal bearing. The modified Reynolds equation is solved numerically through finite difference approach for analysis of texture and non-Newtonian effects on bearing performance characteristics. It is concluded that the load carrying capacity and friction force is increased with shear thickening fluids in both bearings (smooth and rough bearings). It is also concluded that out of three roughnesses, the transverse positive full wave roughness is best for increasing the load carrying capacity and friction force, whereas the longitudinal sinusoidal roughness is best for decreasing the friction force.

Keywords: hydrodynamic journal bearings; power law modelling; surface texture; finite difference method; bearing pressure; load carrying capacity; friction force; friction coefficient; shear thickening fluids.

DOI: 10.1504/IJSURFSE.2010.035150

International Journal of Surface Science and Engineering, 2010 Vol.4 No.4/5/6, pp.505 - 524

Published online: 09 Sep 2010 *

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