新一代运载火箭增压技术研究

随着新一代运载火箭研制的开展，新型120t级高压补燃液氧煤油发动机将得到广泛的使用，该发动机采用的推进剂贮箱增压系统设计被列为新一代运载火箭研制的重大关键技术之一。在对国内外主要液体运载火箭增压方案进行分析的基础上对120t级液氧煤油发动机的贮箱增压系统进行了研究，提出了液氧贮箱采用压力传感器与电磁阀组合的常温氦气加温增压，煤油贮箱采用压力传感器与电磁阀组合的常温氦气增压方案，并针对液氧贮箱采用常温氦气加温增压的方案开展了理论分析和全尺寸系统级试验研究。理论分析和试验结果表明，该增压方案可行。

Study on pressurization of new generation launch vehicle

With the development of new generation launch vehicles, a high pressure staged-combustion liquid oxygen/kerosene propellant rocket engine with thrust level of 120 t will be used exten- sively. The design of the pressurization system is one of the key technologies of new generation launch vehicles. Based on the review of pressurization system used on the domestic and foreign launch vehicles, a new tank pressurization system of launch vehicle used on the liquid oxy- gen/kerosene engine was studied, which used helium gas （heated helium gas in liquid oxygen tank and room temperature helium gas in kerosene tank） as the pressurization gas, and tank pressure and helium flow were controlled by tank pressure sensors and electromagnetic valves. Also a full size experimental research and theoretical analysis of heated helium pressurization system for liquid oxygen tank was conducted. The experiment and analysis results indicate that the pressurization system is feasible.