关键词: 固体推进剂火箭发动机;燃烧稳定性;振荡燃烧;侵蚀燃烧

Abstract: The research started from analyzing amplitude and frequency changes ofhigh-frequency unstable combustion in the solid rocket motors,and simple-frequency vibration combustion characteristics in the primary period of combustion were obtained byadjusting parameters of the solid rocket motor.A profile of burned web,which indicatesthe velocity amplitude distribution of vibration combustion in primary period,was alsoacquired by tests with combustion interruption.These demonstrated that the main frequency in inducing period of vibrant combustion of the actual solid rocket motor was thelongitudinal vibration of high-order harmonic instead of fundamental frequency.Thenthe velocity coapling model of unstable combustion was set up through analysis and calculation of the interior ballistics.

Key words: Solid propellant rocket engine;Combustion stability;Vibrationalcombustion;Erosive burning