| Citation: | SHAO Kaiyuan, WANG Yongjia, ZHANG Yonghui, et al. Study on influence of mixing structure on pulse detonation wave initiation and propagation characteristics[J]. Journal of Aerospace Power, 2025, 41（X）：20250337 doi: 10.13224/j.cnki.jasp.20250337
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In order to obtain the influences of the mixing structure of air-breathing pulse detonation engine head on the working characteristics in the ramjet mode, gasoline was used as fuel and air was used as oxidizer. The influences of the mixing structure on the detonation initiation and propagation characteristics were explored through experiments. A stable detonation with a frequency of 12.5 Hz was achieved, and six combustion modes were summarized. The results showed that compared with the non-swirl structure, the swirl structure was more sensitive to the total pressure of air flow, gasoline flow and ignition energy. As the ignition energy decreased, the duration of unstable combustion increased. When the ignition energy decreased to 3 J, it may lead to ignition failure and a narrower range of stable equivalence ratio. However, the swirl structure can further shorten the detonation distance, and increasing the blockage ratio of the mixing structure can broaden the equivalence ratio range of stable detonation.
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