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在环缝-喷孔对撞式喷注模型发动机上,采用H2/O2热射流切向喷注的起爆方式,进行了H2/Air组合的连续旋转爆震试验,试验成功起爆并实现了爆震波的持续旋转传播。切向喷注的热射流并没有直接诱导形成旋转爆震波,从点火到形成稳定传播的旋转爆震波之间存在时间间隔。对高频信号的时频分析结果表明,在该试验工况下,旋转爆震波的传播过程非常稳定,其传播频率为5.5～5.95 kHz,平均传播频率为5.75 kHz,对应的平均传播速度为1716.4m/s,为理论预测值的91.14%。在没有测量高频压力的情况下开展了长程试验,结果表明,连续旋转爆震波也可以在更长的时间范围内稳定工作。
In the annular slot - jet collided injection engine, H2 / O2 thermal jet tangential injection initiation method was used to carry out the continuous rotation detonation test of H2 / Air combination. The experiment successfully detonated and detonated wave Sustained rotation spread. The tangential jets of thermal jets do not directly induce the formation of a rotating detonation wave, and there is a time lag between ignition and formation of a stable propagating rotational detonation wave. The results of time-frequency analysis of the high-frequency signals show that under the experimental conditions, the propagation of the rotary detonation wave is very stable with the propagation frequency of 5.5-5.95 kHz, the average propagation frequency of 5.75 kHz and the corresponding average propagation velocity of 1716.4 m / s, which is 91.14% of the theoretical predictive value. A long-range test was carried out without measurement of high-frequency pressure. The results show that the continuous rotation of the detonation wave can also work stably over a longer period of time.