A rotating disk cavity-the topology structure of simplified aero-engines bearing chamber is employed to analyze the formation and movement characteristics of oil film.Considering oil droplets gravity and air resistance

the oil droplet movement equitation

oil deposition and oil film movement model are built based on the data of the gas phase gained by CFD software

the impacts of the disk cavity structure and operating conditions on the movement of the oil film is discussed.The results indicate the movement directions of oil film on left and right side chamber wall are different

and the distribution of oil film thickness and mean velocity along wall circumferential direction is notable difference

the structure of the disk cavity and oil supply quantity play significant roles on the movement and thickness of the oil film

especially for low rotor speed.