Deep subcooled liquid oxygen filling and control system and method in cryogenic rocket launch site

Abstract

A deep supercooled liquid oxygen filling and control system and method in a low-temperature rocket launch site, including a ground circulation liquid oxygen storage tank, a negative pressure liquid nitrogen bath heat exchanger and an arrow liquid oxygen storage tank; The combination of liquid nitrogen and low-temperature helium pre-cools the storage tanks on the arrow successively. After the pre-cooling requirements are met, the high-flow filling method is used for filling to achieve the goal of rapid filling; the pressure of the rocket storage tanks is controlled by cold helium technology. Carry out dynamic adjustment and maintenance of large supercooling of liquid oxygen temperature. At the same time, based on the low-temperature liquefaction separation method, cold helium gas recovery and reuse technology is considered; the invention realizes deep supercooling acquisition of liquid oxygen, rapid filling of large flow rate, and filling system The functions of falling off in advance, micro-positive pressure adjustment of deep supercooled liquid oxygen in storage tanks on arrows, maintenance of large supercooling degree, and recycling of helium can provide effective support for deep supercooling of liquid oxygen, filling process and control methods of cryogenic rocket launch sites. refer to.

Description

technical field [0001] The invention relates to the technical field of acquisition and filling of liquid oxygen with a large supercooling degree, in particular to a deep supercooled liquid oxygen filling and control system and method in a low-temperature rocket launch site. Background technique [0002] As the most commonly used low-temperature propellant, liquid oxygen has the advantages of being non-toxic, non-polluting, and high specific impulse. At present, it is widely used as a propellant for large-scale launch vehicles in the world. However, most of the thermal conditions for the application of liquid oxygen propellants are still Near the boiling point temperature. In order to further improve the thermodynamic properties of liquid oxygen and increase the rocket payload, supercooling is often used to densify it. Liquid oxygen is supercooled from the normal boiling point (90K) to near the triple point (56K), the density can be significantly increased by 13.8%, and the ...

AI Technical Summary

Problems solved by technology

Through this pre-cooling method, after filling the deep subcooled liquid oxygen into the rocket tank, the large supercooling degree of the liquid oxygen will absorb the heat capacity of the solid and greatly reduce it, resulting in insufficient densification of the deep supercooled liquid oxygen. use

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