| Citation: | WANG Junkai, ZHAO Qingwei, XIE Wenzhong, et al. Flow field control method for triangular inclined cut entrance S-shaped inlet under ground state[J]. Journal of Aerospace Power, 2025, 40（10）：20240459 doi: 10.13224/j.cnki.jasp.20240459
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The internal flow field of a stealthy inlet with an inclined-cut entrance under the ground state exhibited complex three-dimensional separation structures, which greatly reduced the aerodynamic performance of the inlet and cannot meet the requirements of inlet/engine matching. A lip self-supplying air-jet for flow control method of the ground state of a triangular inclined cut entrance inlet was proposed. Numerical simulation results showed that, at the ground state, the original vortex on the entrance of the triangular inclined cut entrance inlet was divided into two small and one large vortices by the lip self-supplying air-jet, the scale of the vortex near the symmetry plane was significantly reduced, and the shedding of the large-scale vortex near the symmetry plane on the upper wall was delayed, improving the circumferential uniformity of the low total pressure area distribution at the exit section of the inlet, and greatly reducing the distortion index. Furthermore, the effects of the transverse spacing of the jet slot, transverse position of the jet slot, jet angle, and jet area on the aerodynamic performance and flow field structure of the stealth inlet under ground state were studied, and the optimal parameter configuration was obtained. Compared with the baseline, the total pressure recovery coefficient of the control method decreased slightly, and the circumferential distortion index
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