全流量补燃循环发动机推力室再生冷却技术研究

将层板式大高宽比、薄壁、弹性冷却内衬等新技术采用到全流量补燃循环发动机推力室再生冷却设计上,结合全流量发动机工作特点,建立了冷却通道准一维换热和二维数学模型,得到了推力室轴向热参数分布和危险截面冷却通道的温度场和应力场,得出了采用推力室再生冷却新技术相对于传统模式可以较大地降低推力室喉部内壁温、内衬最大等效应力和冷却压降,从而提高推力室寿命及发动机性能的结论,并初步设计出大推力全流量补燃循环发动机推力室再生冷却结构.

Study on regeneratively-cooled technology of full-flow stage combustion thrust chamber

The full-flow stage combustion(FFSC) cycle engine may be applied in the next generation reusable launch vehicle.In order to meet the enhanced life of FFSC chamber,this paper employed some new technologies developed recently to the regeneratively-cooled thrust chamber for its design work.These technologies include formed platelet technology,high-aspect-ratio cooling passages and elastic cooling structure.While cooling models were established in consideration of the character of FFSC chamber,the modeling of applying these technologies to FFSC chamber was conducted.The results show that these methods can drastically reduce the temperature,the strain of hot-gas-side wall and the coolant pressure drop,and a regeneratively-cooled structure of the FFSC thrust chamber had been preliminarily designed.