Multi-liquid hydrogen storage tank parallel-connection injection method for hydrogen-oxygen rocket tests

Abstract

The invention discloses a multi-liquid hydrogen storage tank parallel-connection injection method for hydrogen-oxygen rocket tests. A multi-storage tank parallel-connection system consists of a precooling injection storage tank group 1, a small-flow injection storage tank group 2, a large-flow injection storage tank group 3, a liquid hydrogen storage tank 4, branch pipelines 5, a main pipeline 6, precooling isolating valves7, small-flow isolating valves 8, a main liquid discharge valve 9, liquid hydrogen storage tank supply and discharge valves 10, a liquid hydrogen storage tank self-pressurizing system 11, and a hydrogen-oxygen rocket 12. Due to function grouping of the storage tanks and switching of the isolating valves, isolation of different flow procedures of precooling, small-flow injection and large-flow injection can be achieved; due to adoption of the liquid hydrogen storage tank self-pressurizing system, effective control on flow, temperature and liquid level in the injection process is achieved; due to arrangement and switching of pipeline components, and an abutting structure of branch / main pipelines, fluctuation impact of the injection process can be eliminated. The multi-liquid hydrogen storage tank parallel-connection injection method disclosed by the invention is simple and reliable, and is already successfully applied.

Description

technical field [0001] The invention relates to a liquid hydrogen filling method, which is used for rocket body dynamic test or shooting range launch of hydrogen-oxygen carrier rocket, and belongs to the field of carrier rocket ground engineering application. Background technique [0002] When a hydrogen-oxygen launch vehicle is undergoing large-scale ground tests, it is necessary to fill the hydrogen tank of the rocket body with liquid hydrogen propellant, and the filling amount is nearly a thousand cubic meters. Due to the large amount of filling and consumption of hydrogen tanks in the rocket body, and the limited volume of liquid hydrogen storage tanks on the ground, multiple liquid hydrogen storage tanks are required to provide them at the same time. In addition, the liquid hydrogen filling process is complex, divided into pre-cooling filling, small flow filling and large flow filling; the diameter, length and flow components connected to the branch pipeline of the liqu...

AI Technical Summary

Problems solved by technology

In addition, the liquid hydrogen filling process is complicated, divided into pre-cooling filling, small flow filling and large flow filling; the diameter, length and flow components connected to the branch pipeline of the liquid hydrogen storage tank and the main pipeline are different, and the flow characteristics are inconsistent; The temperature of liquid hydrogen at the bottom of the storage tank is too high in the later stage of filling, which is not conducive to filling; the storage capacity of liquid hydrogen storage tanks is different, and the liquid level drops in the same amount, resulting in fluctuations in filling flow and temperature quality degradation; the above factors comprehensively restrict liquid hydrogen The flow rate and temperature quality of the filling process, so it is necessary to design a method for parallel filling of multiple storage tanks

Images