Liquid oxygen temperature zone cold helium direct pressurization ground test device and test method

Abstract

The invention discloses a liquid oxygen temperature zone cold helium direct pressurization ground test device and test method. According to the test device and test method, liquid nitrogen is adoptedto cool helium flowing out of a helium steel cylinder group through a heat exchanger, so as to obtain cold helium of a liquid oxygen temperature zone, and the cold helium is controlled to flow into atest storage box for pressurization and liquid discharge; data such as fluid pressure, temperature and flow in the pressurizing and discharging process can be recorded, liquid flowing and crystallization states can be observed, and the device and method can measure various working conditions. The cold helium direct pressurization ground test device is specifically characterized in that the normal-temperature high-pressure helium flows out of the helium steel cylinder group, flows into a decompression path after being decompressed by a gas distribution table, then exchanges heat with the liquidnitrogen through the heat exchanger, is cooled to a liquid nitrogen temperature zone, and finally enters a storage tank for pressurization and liquid discharge, and a gas source and the liquid nitrogen are closed when the liquid in the storage tank is completely discharged, so that test measurement work is completed. The test device and the test method have a multi-working-condition testing function, and are reliable in control, stable in system, simple in structure and accurate in measurement.

Description

technical field [0001] The invention relates to the testing technology of a cold helium pressurization system, in particular to a ground test device and a test method for direct pressurization of cold helium in a liquid oxygen temperature zone. Background technique [0002] The pressurization system is an important part of the liquid rocket, which is used to realize the propellant entering the combustion chamber or the inlet of the engine pump at a certain pressure and flow rate to meet the pressure demand of the combustion chamber or engine pump. Common pressurization methods for liquid rockets include gas pressurization, self-generated pressurization, and cylinder pressurization. At present, most of the cylinder pressurization schemes used by liquid rockets are heated and pressurized helium at room temperature or heated and pressurized with cold helium. Both of these two pressurization methods have certain shortcomings. The heating and pressurization of normal temperature...

AI Technical Summary

Problems solved by technology

However, this system is suitable for launch vehicles, and it is a bubbling pressurization method, which cannot be used for principle experiments on the ground, nor can it control the inlet gas temperature

In terms of research on the hydraulic characteristics of cold helium direct pressurization discharge, there is currently no relevant cold helium pressurization ground test and measurement device

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