The wall film in bearing chamber is divided into flow control units which are related to each other. Based on the motion state of droplet and wall film

the mass

momentum and heat transfer were analyzed in each flow control unit. And then the unsteady mass

momentum and heat equations of each flow control unit were established and solved by house coding with help of Matlab. A theoretical method to analyze flow and heat transfer characteristics of wall film in bearing chamber was established. Results showed that the film thickness was within the range of 0-1 mm

the film velocity was within range of 0-5 m/s

and the film temperature was within the range of 100-140 ℃. At the same condition

the highest film temperature increased by 13% compared with the lowest film temperature. The film velocity and temperature increased with the rotor speed

while the film thickness decreased with the rotor speed. The film thickness and velocity increased with inlet flow rate

while the film temperature decreased with inlet flow rate. The research work is not only a theoretical foundation but also a data support for improvements of the efficiency of aero engines.