关键词: 薄膜冷却;气膜冷却;试验;理论;研究

Abstract: According to the flow characteristics of the composed liquid-gas film, a"four-storied" flow frame physical model is established.In the light of assumptions proposed, theoretical Calculations have been made on flow frame and cooling effect of liquid film flow section at first and theoretical estimation of cooling characteristics of the followed gas film flow section has been developed by analytical method. Under set experimental conditions, verifying experiments have been performed.The results indicae that the theoretical calculations are conformed to the experimental investigation on the whole.And the theoretical research work on the gas film section is an important effort.With it, some characteristics of the gas film cooling after liquid film vaporized-out point have been revealed.A practical way is presented for theoretical study on the cooling effect nf composed liquid-gas film flow.This paper is of certain value to the development of cooling instrument of new aero-space propulsion systems.

Key words: Film cooling;Gaseous film cooling;Test;Theory;Research