关键词: 燃烧室沉积灰;固体火箭发动机;火箭发动机喷管;温度分布;数学模型

Abstract: Based on the heat transfer theory,a solution is obtained to predict the change of the deposit thickness of alumina with time on the nozzle wall of a solid rocket motor.The temperature distribution and the thickness of the deposit layer along the nozzle wall have been calculated.The deposition rate,which is not a constant at the initial period of the deposition process,can also be calculated. The trend of the theoretical results agree with the experiment data from the engine interrupteed tests.

Key words: Combustion deposit;Solid rocket engine;Rocket engine nozzle;Temperature distribution;Mathematical model