关键词: 固体火箭发动机;燃烧稳定性;声波;预估

Abstract: A method of predicting the combustion stability in solid rocket motors is proposed in this paper. Emphasis on the numerical analysis of the acoustic field in combustion chambcrs,the acoustic finite element was used to calculate the acoustic natural frequencies and modes in the internal cavity of a solid rocket motor with two-dimension axial symmetric grain. Based on the acoustic analysis, combustion stability prediction of this motor has been made. The results are consistent with results of firing tests. Finally, some problems, for example verification of the acoustic analysis, reduction of operation time and occupied internal storage, determination of particle size,and versatility of the prediction method and computer program were discussed.

Key words: Solid rocket engine;Combustion Stability;Acoustic wave;Prediction