低温推进剂双管输送系统循环预冷实验研究

为了抑制火箭发动机中低温推进剂输送管路中产生的间歇泉现象,采用液氮为工质,进行了低温推进剂双管输送循环预冷模拟实验研究。研究了输送管壁不同绝热条件、贮箱增压及气体引射对自然循环预冷过程的影响。通过实验获得了循环管路的循环压差及管路温度分布。结果表明:管壁绝热条件相差越大,循环压差越大;贮箱压力增大,循环压差降低;气体引射的作用不大;双管输送循环预冷系统中的低温流体形成了自然循环,可以有效抑止低温推进剂输送管路中的间歇泉现象产生。

Experimental investigation of dual-feed recirculation in cryogenic propellant transfer system

The main purpose of this paper is to use a dual-feed recirculation system to inhibit geysering in cryogenic propellant transfer system. A modeling experiment is made with liquid nitrogen as a working fluid. The effects of different insulation, tank pressure and injection situations on the precooling process were investigated. The differential pressure and wall temperature distribution of transfer pipe were recorded. From the result, it is clear that the nature circulation occurs in the recirculation utilizing dual-feed system. The method of experiment can provide possible way to reduce or eliminate geysering in cryogenic propellant transfer system.