关键词: 准一维Euler方程;超音速冲压喷气发动机;流道+;流动分布;性能评估

Abstract: One-dimensional code for the computation of the scramjet flowpath is developed by adding the source terms for the area variation, friction,mass addition and chemical heat release to the quasi-one-dimensional Euler equations.The thrust and friction forces as well as the parameters variations along the axis direction and the exit parameters of the scramjet were given in a short time.Validated by the computation of the reacting flow of NAL’s dual mode scramjet model,the influences of the expanding angles of the isolator and the combustor,the location and the means of the fuel injection,the two methods to solve the chemical heat release term,the isolator height to the performance of the scramjet fueled by kerosene are analyzed.The scramjet configuration with good performance with steady shock for the flying vehicle design can be demonstrated.

Key words: Quasi-one-dimensional Euler equations;Scramjet;Flowpath+;Flow field;Performance evaluation