关键词: 兵器科学与技术, 连续旋转爆轰发动机, 汽油/富氧空气混合物, 双波对撞模态, 时频分析, 推力, 比冲

Abstract: The ring-shaped arrangement continuous rotating detonation engine, in which the mixture of gasoline/oxygen-enriched air is injected, is test. The propagation characteristics, time-domain characteristics, frequency-domain characteristics and detonation height of self-sustained detonation wave under two-wave collision mode are analyzed in detail. One-dimensional thrust of the engine model under two-wave collision mode is measured. The experimental results show that the detonation has an average frequency of 2.174 kHz and an average velocity of 1 051 m/s, the detonation wave height is between 55 and 70 mm, the effective thrust is 607.3 N, the thrust per unit area is 8.587×10⁴ N/m², and the fuel specific impulse is 735.1 s under the operating conditions of 0.82 equivalence ratio, 945.3 g/s oxygen-enriched air (34.3%O₂ and 65.7% N₂) and 84.3 g/s gasoline. It shows that the engine thrust under two-wave collision mode fluctuates obviously, the thrust oscillates around the average thrust, and the vibration frequency of engine and the propagation frequency of detonation wave are basically identical at the stable phase in the thrust curve. Key

Key words: ordnancescienceandtechnology, continuousrotatingdetonationengine, gasoline/oxygen-enrichedairmixture, two-wavecollisionmode, time-domainandfrequency-domainanalysis, thrust, specificimpulse