Abstract:Considering the cavitation effect and the interface slip of the inner wall surface of the bearing,a twophase flow model of the sliding bearing was established with Fluent to study the influence of different slip areas,rotational speed and viscosity on the oil film bearing capacity and cavitation distribution.The results show that the compound sliding surface can improve the oil film pressure and bearing capacity better than the fully slipped and nonslip surface,and it also can reduce the proportion of high air volume fraction cavities.The increase of the rotation speed can increase the oil film pressure and bearing capacity,but the proportion of voids in the high volume fraction of the oil film will increase.Although the increase in viscosity can increase the bearing capacity of the bearing,it also aggravates the cavitation phenomenon in the divergent wedge region and decreases the stability of the oil film.