固体燃料冲压发动机性能预示

Prediction Model of Performance for Solid Fuel Ramjet

关键词:  固体燃料冲压发动机  性能预示  燃速  推力 

Key words:  Solid fuel ramjet  Prediction model of performance  Regression rate  Thrust

摘要:

为研究弹用固体燃料冲压发动机的工作性能,建立了其性能预示模型。在此基础上对高炮用固体燃料冲压发动机的工作性能进行了预示、分析。结果表明:当飞行高度由0增大至10km时,发动机的燃速、推力均下降约50%；当飞行马赫数由2.5增大至3.0时,燃速增大25%~35%,推力增大20%；随着燃料的不断消耗,发动机推力变化量小于10%；在设计状态下推力有一定的余量,能够保证发动机正常工作。 

Abstract:

In order to predict the performance of solid fuel ramjet used in projectile, the prediction model was developed. Then, the performance of solid fuel ramjet of one anticraft projectile was calculated. The results show that when the alitude increases from 0to 10km, the values of regression rate and thrust of engine both decrease 50%, approximately. When the flight Mach number increases from 2.5to 3.0, the values of regression rate and thrust increase 25%~35% and 20%, respectively. With the fuel burned, the changed value of thrust is less than 10%. The value of thrust was greater than drag in designed state to ensure that the solid fuel ramjet can operate normally. 