固体火箭发动机不稳定燃烧的速度耦合模型的研究

由分析固体火箭发动机的高频不稳定燃烧的振幅和频率变化的复杂性开始，通过调整参数，通过调整参数，得到在燃烧前期呈现较单纯纯频的振荡燃烧。利用中止燃烧试验，得到反映前期振荡燃烧的速度幅分布的烧去肉厚分布。

AN INVESTIGATION ON VELOCITY COUPLING MODEL FOR UNSTABLE COMBUSTION IN SOLID ROCKET MOTORS

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.