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为了研究脉冲爆震发动机的高频工作特性,以航空煤油和压缩氧气为推进剂,采用爆震增强装置,增大推进剂供给压力以及增大电磁阀控制气压力等措施,在脉冲爆震火箭发动机模型上进行了实验,成功获得45Hz时的爆震压力波形。实验结果表明,频率增高,爆震波峰值压力下降,有利于加速缓燃向爆震的转变(Defla-gration to Detonation Transition,DDT)。当爆震充分发展时,爆震波波速基本不变,峰值压力上升时间趋于定值。工作频率为45 Hz时,爆震波峰值的压力为3.2 MPa,爆震波的波速为1 715.5m/s。
In order to study the high-frequency pulse detonation engine operating characteristics, the use of aviation kerosene and compressed oxygen as a propellant, the use of detonation enhancer device to increase the supply pressure of propellant and increase the pressure control solenoid valve and other measures, pulse detonation rocket Experiments were carried out on the engine model and the knock pressure waveform at 45 Hz was successfully obtained. The experimental results show that the frequency increases and the peak pressure of the detonation wave decreases, which is favorable for accelerating the transition from ignition to detonation (DDT). When the full development of detonation, detonation wave velocity basically unchanged, peak pressure rise time tends to set value. When the operating frequency is 45 Hz, the pressure of the detonation wave peak is 3.2 MPa and the detonation wave velocity is 1 715.5 m / s.