| Citation: | SU Jiayin, LI Bo, TONG Jiahui, et al. Influence of DSI two-stage swept back lip on aircraft external flow[J]. Journal of Aerospace Power, 2023, 38（8）：1926-1936 doi: 10.13224/j.cnki.jasp.20210653
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In order to study the influence of diverterless supersonic inlet (DSI) lip on the overall aerodynamic performance of the aircraft, the internal and external flow fields were simulated by numerical simulation method. Based on the benchmark model of single-stage swept back lip with the optimal inlet performance, a two-stage swept back lip model was designed. It was found that compared with benchmark model, the two-stage swept back lip model can not only improve the total pressure recovery coefficient and reduce the flow distortion index of the inlet, but also change the lift of the wing by changing the pressure distribution on the wing surface, and then affect the aerodynamic characteristics of the aircraft as a whole. Within the range of two-stage sweep back angle in this study, an optimal angle 35° can help further improve the lift-drag ratio of the aircraft aerodynamic layout by 0.034, and the gain up to 2.1%.
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