Abstract:Taking the fluid domain of deep/shallow recessed bearing as the research object,the NavierStokes equations was solved by the Eulerian multiphase flow model in CFD simulation software,and based on the Realizable kepsilon turbulence model.Taking into account the cavitation effect,pressure distribution of water film and vapor volume fraction was studied under different journal rotational speed and eccentricity.DPM model was adopted to analyze the influence of mass fraction and diameter of the impurity particles on the loadcarrying capacity under the fixed condition.Results show that with the increasing of rotational speed and eccentricity,loadcarrying capacity is increased,and the maximum pressure peak appears at the end of the shallow recess of the convergent wedge.The cavitation region is enlarged with the increasing of rotational speed,including significant cavitation phenomenon on both ends of deep recess of the divergent wedge.The maximum pressure and loadcarrying capacity are increased slightly with the increasing of particle mass fraction.Larger impurity particles has significant effects on the loadcarrying capacity,when particle diameter is close to the minimum film thickness,the maximum pressure and loading capacity will rise significantly,but the friction and wear of the bearing is also aggravated.