Numerical Simulation Of Compulsion Oil Thrust Bearing Lubrication

Computational Fluid Dynamics (CFD) can be described as the use of computers to produce information about the ways in which fluids flow in given situations. CFD embraces a variety of technologies including mathematics, computer science, engineering and physics, and these disciplines have to be brought together to provide the means of modeling fluid flows.This thesis presents the numerical studies results of lubrication of compulsion oil thrust bearing using CFD tools. The theoretical analyses and CFD simulation of flow and heat transfer inside the 2D bearing were performed to validate the CFD tools used in this study . By comparing different results available from the paper and research report, CFD simulation results shows strong capability in simulating flow and heat transfer for complex geometry. The comparison among the CFD simulation results, theoretical analyses results and other people's simulation results shows very good agreement. Also grid independent study was conducted for CFD code to improve the accuracy and reliability of simulation results.Numerical analysis model was developed using CFD to study the lubrication of oil bearing. The boundary conditions were same as the work environment of the bearing. For a fixed rotating speed, the position of the axis were changed, and the movement and force were analyzed, and the balancing positions were found out at different rotating speed .The CFD software were used to analyze the computational results and can know that: under a fixed load, the faster the rotating speed the thicker the min. oil film; with the increase of the rotating speed ,the viscous force increased and the average temperature in the bearing increased ;at a fixed rotating speed ,the average temperature in the bearing decreased with the oil flux increased.