Thermoelastohydrodynamic Behavior of a Journal Bearing With Turbulent Flow

Abstract

Turbulence is an irregular fluid motion in which the various flow properties such as velocity and pressure show random variations with time and position. A number of authors proposed different solutions e.g. for pressure distribution, temperature prediction and ThermoHydro-Dynamic "THD" analyses. In a fluid film bearing, the pressure in the oil film satisfies the Reynolds equation which intern is a function of film thickness. In the presented cases of fluidstructure interaction analyses, all important phenomena accompanying bearing operation are considered, e.g. lubricant flow, structure movements and their deformations as well as heat transfer in case of thrust bearing. In this paper, the authors have developed an empirical relationship to determine the effect of lubrication when considering ThermoElastoHydroDynamic "TEHD" lubrication with turbulent flow. The critical point of this work is to import the matrix data (the pressure and temperature fields...) from the fluid domain to the internal surface of the bearing with a precision of the mesh especially in the contact surface. The results presented in the median plane as a function of the bearing angle. A parametric study deals with the influence of rotation speed and the type of turbulence model on the pressure, temperature, deformation and stress intensity fields.