通过对预混可燃流体在大长径比圆管内的流动和传热的分析,首次提出一种用于脉冲火箭发动机多次点火的方法。新型发动机中,预混可燃流体在流动过程中被加热,并自动点火,按需要通过迅速散热保证熄火,从而实现了任意脉冲的自动点火和熄火,并可实现推力调节。对这种点火方法进行了理论分析和实验研究,成功地得到了5个工作脉冲。 Based on the analysis of the flow and heat transfer of premixed combustible fluid in a tube with a large aspect ratio, a method for multiple ignition of a pulse rocket engine is proposed for the first time. The new engine, the premixed combustible fluid is heated in the flow process, and automatic ignition, as needed by rapid cooling to ensure that the flame, so as to achieve any pulse of automatic ignition and flameout, and can achieve thrust adjustment. The ignition method of this theoretical analysis and experimental study, successfully obtained five working pulses.