| Citation: | Xu Jinxuan, Xu Xiaorui, Yang Zhao, et al. Suppression of detonation wave backward propagation by topological fluid diode[J]. Journal of Aerospace Power, 2026, 41（7）：20250013 doi: 10.13224/j.cnki.jasp.20250013
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For the rotating detonation engine, the oblique shock waves induced by detonation waves can lead to upstream high-pressure pulsations, affecting the stable operation of the engine. A class of topological fluid diode anti-backward propagation intake structures was designed, and numerical simulation methods were used to compare and analyze the flow field distribution and pressure backward propagation characteristics of six different configurations under cold flow and pressure pulsation conditions. The research results indicated that the topological structure can effectively change the direction of the backward propagation gas and reduce its speed, thereby effectively suppressing the shock waves backward propagation. By analyzing the maximum static pressure and the pressure pulsation along the process, it was found that the depth and level of the topological fluid diode were key design parameters affecting the suppression of detonation wave backward propagation. Among them, the single-level-slot depth 20 configuration showed lower maximum static pressure and pulsation amplitude under various conditions, with a pressure suppression rate reaching up to 10.23%. Additionally, the three-level configuration also showed good suppression effect due to more sufficient vortex formation.
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