无阀式煤油脉冲爆震火箭发动机工作循环特性研究

In order to study on the pulse detonation rocket engine at high frequency, experimental verification was performed on the valveless self-adaptive mode. Kerosene was utilized as fuel, and oxygen-enriched air as oxidizer. Characteristic time of each process during one cycle was also analyzed.?Fully developed detonation waves at a steady operating frequency of 60Hz were successfully obtained in the PDRE. The results indicated that, the time from ignition to exhaust is relatively fixed. Propellants injection occupied most of the time during one operating cycle, which limited the maximum frequency of the engine. It is feasible to improve the upper limit operating frequency of the PDRE by increasing the injection pressure in an appropriate range. The propellant-based specific impulse is 122±11s when the operating frequency of the engine is 60Hz.