Vacuum plume effect experimental system Hydrogen system

Abstract

The invention discloses a hydrogen system of a vacuum plume effect experiment system. The hydrogen system of the vacuum plume effect experiment system comprises a high-pressure hydrogen circuit, a commanding / replacement gas circuit, a main hydrogen circuit, a branch hydrogen circuit, a pneumatic valve control circuit and a high-capacity lower-pressure hydrogen storage tank circuit. According to the hydrogen system of the vacuum plume effect experiment system, the pressure of low-pressure hydrogen is adjusted by means of a pneumatic pressure reducer, the adjusting accuracy is high, fluctuation is little, and the hydrogen system is particularly suitable for a low-pressure and small-flow vacuum plume effect experiment. High-pressure nitrogen serves as the air source of the pneumatic pressure reducer, control is achieved through a needle-shaped throttling valve, the pressure of the high-pressure nitrogen can be reduced without the need of using a pressure reducer, complexity of the system is reduced, and safety performance of the system is improved. According to the hydrogen system of the vacuum plume effect experiment system, the high-pressure nitrogen serves as the air source of the pneumatic pressure reducer on one hand and is used for replacement of the system on the other hand, air in a pipeline is replaced with the nitrogen before the hydrogen is led into the system, and safety accidents caused by reaction between the hydrogen and the air in the pipeline are avoided; the system is further simplified and safety performance is further improved.

Description

technical field [0001] The invention relates to a hydrogen system of a vacuum plume effect experimental system, belonging to the technical field of gas pressure control. Background technique [0002] The feathery high-speed, high-temperature jets produced when the engine works in a vacuum environment are called plumes. The plume will produce aerodynamic effects, aerothermal effects, pollution effects, electromagnetic effects, etc. on the spacecraft, collectively referred to as the plume effect, and the plume effect will affect the mission of the spacecraft. Experimental studies on plume effects include space loading tests and ground simulation tests. The space loading test data is true and reliable, but the test cost is high, the cycle is long, the number of times is small, and the amount of data obtained is limited. The one-time investment of the ground simulation test system is large, and the cost of a single test is low. It can repeatedly conduct tests in different work...

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Problems solved by technology

[0004] At present, there is no hydrogen system specially used for vacuum plume effect test in China. The existing hydrogen system for engine test is mainly to provide hydrogen for engine test in atmospheric environment. Generally, it is specially designed for a certain model or task. The system provides The pressure of the vacuum plume effect is high and the flow rate is large, which is not suitable for the low-pressure and low-flow engines used in the plume effect test. Various attitude control or scaled engines have a large range of pressure and flow adjustments. Therefore, it is necessary to design a hydrogen system with strong versatility, which can meet the needs of different projects and is suitable for vacuum plume effect tests.

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