Deep supercooled liquid oxygen filling and control system in low-temperature rocket launching site and method

Abstract

The invention discloses a deep supercooled liquid oxygen filling and control system in a low-temperature rocket launching site and a method. The system comprises a ground circulating liquid oxygen storage tank, a negative-pressure liquid nitrogen bath type heat exchanger and an on-rocket liquid oxygen storage tank. Before launching, saturated liquid nitrogen and low-temperature helium are combinedto precool the on-rocket storage tank in sequence, after the precooling requirement is met, a large-flow filling mode is adopted for filling, and the purpose of rapid filling is achieved; and a coldhelium technology is adopted to dynamically adjust the pressure of a rocket storage tank and maintain large supercooling of liquid oxygen temperature, and meanwhile, a cold helium recycling technologyis considered based on a cryogenic liquefaction separation method. According to the system and the method, the functions of deep supercooled acquisition and high-flow rapid filling of liquid oxygen,advanced falling of a filling system, micro-positive pressure adjustment and large supercooling degree maintenance of the deep supercooled liquid oxygen of the on-rocket storage tank, helium cyclic utilization and the like are realized, and effective reference can be provided for deep supercooling and filling processes and a control mode of the liquid oxygen in the low-temperature rocket launchingsite.

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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