三组元液体火箭发动机涡轮泵变工况研究

本文通过对国内外分级燃烧循环发动机和有关单级入轨发动机涡轮泵研究结果的分析，提出了三组元涡轮泵性能参数的限制范围与要求。在低比转数为50的泵机组全流量特性水力试验的基础上，阐述了低比转数泵相对的全流量特性变化规律。分析了几个不同比转数泵的水力试验结果，建立了三组元泵性能特性的数学方程。据此，依据泵的工况调节方法对三组元涡轮泵模式一和模式二下的性能进行了分析计算。

Study on Tripropellant Turbopump for the Liquid Rocket Engine with Variable Operation Conditions

Domestic and international study results of staged combustion cycle engines and turbopumps of single-stage-to-orbit (SSTO) engines are analyzed. According to these analysis results, range limits and requirements of tripropellant turbopump performance parameters are derived. The full-flow hydraulic tests of the low-specific-speed turbopump assembly were carried out. Based on these test characteristics, the variety regulation of the low-specific-speed pump relative to the full-flow characteristics was discussed. The hydraulic test results of several differente specific-speed pumps were analyzed, and the mathematical equation of the tripropellant pump performance characteristics was built. Finally, according to the operation condition adjusting method of the pump, the tripropellant turbopump performances both in model 1 and in model 2 were computed and analyzed.