关键词: 固体火箭发动机;固液混合火箭发动机;性能分析

Abstract: The effect of adding liquid hydrogen into a solid rocket motor on the performance of the motor is analysed based on the thermodynamic calculation. It is shown that adding liquid hydrogen is available to reduce the molecular weight of the gaseous components and to increase the specific impulse of the motor. For the discussed example, the specific impulse increases by 4.2%.

Key words: Solid rocket engine;Hybrid propellent rocket engine;Performance analysis