摘要
低温液体火箭发动机由于低温特性在起动前必须对发动机及其增压输送系统进行充分预冷。预冷方式很大程度上决定了一枚火箭射前操作程序的复杂性和推迟发射的适应性,具体选择哪一种预冷方式需要综合考虑。通过比较3种常见预冷方式的优缺点,给出了选取预冷方式需考虑的因素和准则。最后通过AMESim两相流库建立了氢循环泵强迫预冷模型,根据系统特性提炼了贮箱气枕压力、循环泵转速和氦隔离密封腔压力等3个影响预冷的因素。仿真结果表明,这3个因素对循环预冷的影响主要是通过改变循环泵出口压力与氦隔离腔密封压力差来实现的。越大的压力差越有利于达到发动机预冷条件。
Due to the low boiling point for cryogenic propellant,the cryogenic rocket engine and delivery pipelines must be fully cooled before startup.Pre-cooling methods largely influence the complexity of the pre-launch rocket test procedure and the adaptability of delayed launch.Therefore,it is needed to comprehensively consider amounts of factors.In this paper,by comparing three pre-cooling methods in detail,selection principles are given.Finally,a model of the forced circulation pre-cooling system for hydrogen is developed with AMESim.According to the system characteristics,it is found that the tank pressure,the speed of the circulating pump and the pressure in the isolated cavity influence the cooling effect.The simulation results show that the pressure difference between the outlet pressure of the circulating pump and the pressure in the isolated cavity is the key factor,and the bigger,the better.
作者
黄兵
李东
张树杰
于子文
HUANG Bing;LI Dong;ZHANG Shujie;YU Ziwen(Beijing Institute of Astronautical Systems Engineering,Beijing 100076,China;China Academy of Launch Vehicle Technology,Beijing 100076,China)
出处
《深空探测学报（中英文）》
CSCD
北大核心
2021年第4期399-406,共8页
Journal Of Deep Space Exploration
