某型液体火箭发动机燃烧不稳定性鉴定实验研究

Critical Experimental Research on Liquid Rocket Engine Combustion Instabilities

采用脉冲枪装置,在液体火箭发动机燃烧室中产生燃烧波,对发动机燃烧过程进行人为激励;通过实验参数测量系统,测量激励前后燃烧室的脉动压力和机械振动频率等参数,分析燃烧室脉动压力的振荡衰减率,进行发动机燃烧不稳定性鉴定实验研究。结果表明:该型液体火箭发动机燃烧过程对脉冲扰动是稳定的。

In this paper,the combustion wave is produced by a pulse gun in the liquid rocket engine combustion chamber;the pulsating pressure and mechanism vibration of the chamber are recorded by the experimental data record and analysis system;and the damping ratio of pulsating pressure is obtained.The damping ratio is compared with parameter of congener engine.The experimental result indicates that the combustion process of the engine chamber is stable for pulsate disturbing.