关键词: 连续旋转爆震模型发动机； H2/Air；单波模态；时频分析；推力测量；推力积分；比冲；推力稳定性

Abstract: A model continuously rotating detonation engine(CRDE)，in which H2/Air mixture via slit-orifice collision was injected，was used to study the typical waveform characteristics and the time/frequency-domaincharacteristics of the self-sustained single rotating detonation wave. Simultaneously，one dimensional thrust sup. plied by this model engine working in single wave mode was directly measured，and propulsive performance，such as specific impulse，was explained. Results show that supplying the operating condition of 1 atmosphere backpres.sure and 0.834 equivalent ratio，that is，air injected 253 g·s-1 and H2 injected 6.15 g·s-1，the model engine steadi. ly works in single wave mode for 360 ms，which has an average frequency of 5.5563 kHz and an average velocity of 1658.3 m·s-1. Therefore this model engine generates a reliable effective thrust of 183.7 N. Calculated in rocket mode，the effective exhaust velocity is 708.9 m·s-1，and total specific impulse is 72.34 s. Calculated in ramjet mode，the effective exhaust velocity(hydrogen consumption rate)is 29870 m·s-1，fuel specific impulse is 3048 s， the consumption of hydrogen mass flow rate per unit area is 4122 g·m-2·s-1，and the unit thrust is 726 m·s-1. The area integral of thrust curves indicates thrust provided by the rotating detonation model engine is relatively stable.In microscopic perspective，the thrust wave and the high frequency continuously rotating detonation wave couple and resonate，vibrating around the approximately average thrust.

Key words: Continuously rotating detonation model engine；H2/Air；Single wave mode；Time-domain and frequency-domain analysis；Thrust measurement；Thrust integration；Specific impulse；Thrust stability