Evaluation and experimental research on the design characteristics <?A3B2 pi6?>of an improved DSI inlet

Before the inlet/engine joint matching test, it is necessary to evaluate the aerodynamic characteristics of the inlet under the design state to verify the aerodynamic performance. A DSI inlet was taken as the research object so to establishe the DSI inlet 3D simulation calculation model and the improved design scheme. The experimental adaptability of the improved scheme model was verified, and the inlet aerodynamic characteristics under different Mach numbers on the ground was calculated. The flow field distribution characteristics in the channel and the accuracy of AIP cross section probe measurement were analyzed. It has been verified that the aerodynamic characteristics and distortion characteristics can match the performance requirements of the engine. The applicability of the simulation method was verified by the comparison of aerodynamic characteristics and the advanced joint test.