Open AccessEffects of Surface Roughness and Supply Inertia on Steady Performance of Hydrostatic Thrust Bearings Lubricated with Non-Newtonian Fluids
Author(s) -
Udaya P. Singh
Publication year - 2021
Publication title -
strojnícky časopis/journal of mechanical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.276
H-Index - 8
eISSN - 2450-5471
pISSN - 0039-2472
DOI - 10.2478/scjme-2021-0038
Subject(s) - inertia , mechanics , hydrostatic equilibrium , surface roughness , materials science , thrust bearing , newtonian fluid , non newtonian fluid , lubrication , surface finish , viscosity , hydrostatic pressure , shear thinning , flow (mathematics) , geotechnical engineering , thrust , mechanical engineering , composite material , geology , classical mechanics , engineering , physics , quantum mechanics
The objective of present theoretical analysis is to study the combined effects of surface roughness and fluid inertia (including the inertia of the fluid in the supply region) on the steady performance of stepped circular hydrostatic thrust bearings lubricated with non-Newtonian pseudoplastic fluids using Rabinowitsch stress-strain model. To account for the effects of surface roughness, the classical Christensen theory of rough surface has been taken. Analytic expressions for film pressure in bearing regions have been established for radial and circumferential patterns of roughness. Numerical results for film pressure, load carrying capacity and lubricant flow rate has been plotted and analysed. Due to surface roughness and fluid inertia in overall regions, significant improvement in performance properties have been observed.