液氧贮箱自生增压输液模拟试验

Simulation test of liquid oxygen transportation by self-pressurization method

以液氮为模拟推进剂,含二氧化碳的氮气为增压气体,进行了液氧煤油火箭的液氧箱自生增压试验研究。通过改变增压气体中二氧化碳的含量,分别模拟了液氧加热气化增压输送和富氧燃气增压输送,同时进行了二氧化碳在液氮中的结晶小试验,通过试验,从原理上验证了含二氧化碳的氮气增压输送液氮方案是可行的,为进一步试验研究及系统设计提供了参考。

A series of experiments were carried out to investigate cryogenic liquid transfer performance by self-pressurization method for liquid oxygen tank. The working fluid is nitrogen and the pressurizing gas is nitrogen including a small fraction of carbon dioxide, respectively. By varying the content of CO2 in the pressurizing gas, liquid oxygen gasifying pressurization mode and abundant oxygen pressurization mode are simulated. Besides, an experiment of CO2 crystallization in liquid nitrogen is also conducted. The experiments show that the modes of simulation test are feasible. The investigation provides a reference for further study.