Composite Extended Range Shells, Gas Is The Second Expansion Of The Theoretical Calculations And Experimental Validation Studies

Gas second expansion theory of base bleed is a kind of approach which can increase efficiency of base bleed. This article is mainly about the gas second expansion theory and its flow emulation, the gist to which the design of second expansion structure according was brought forward. The article contents deduction of the theory's account expressions - its result and analysis of its implication; structure design of the device according to second expansion theory; gas flow in base bleed emulation with fluent. Based on these works, a test was taken to know the real situation.In this article, the program was developed that based on the second expansion theory through combing second expansion theory and over head program, it will be a kind of numeric calculation tool for farther study of the theory, it will bring engineering value to the development of base bleed and rocket-assisted projectile...