Models & Optimisation and Mathematical Analysis Journal
Volume 2, Numéro 1, Pages 55-59

Numerical Study Of The Influence Of Turbulent Regime On The Load Capacity Of A Hydrostatic Journal Bearing

Authors : Nemchi Amina . Bouzidane Ahmed . Abed Asma .

Abstract

The aim of the paper work is to investigate and predict the performance characteristics of four-pad hydrostatic journal bearings loaded between pads in both laminar and turbulent regimes. Linear modeling was performed using a numerical method to study the effects of Poiseuille Reynolds number, eccentricity, squeeze velocity and pressure ratio on the static and dynamic characteristics of hydrostatic journal bearings. The finite difference method has been used to solve Reynolds equation, based on Constantinescu’s turbulent lubrication theory, governing the lubricant flow in film thickness of hydrostatic bearings. It assumed that the fluid flow is incompressible, isothermal, steady-state and inertialess fluid. The results presented in this paper are expected to be quite useful to bearing designers, in order to use it as a device for actively controlling rotors operating at high speeds.

Keywords

hydrostatic journal bearings, laminar and turbulent regimes, squeeze velocity, eccentricity ratio and pressure ratio.