High-pressure gas flow rapid pressure reduction fairing device and method

Abstract

The invention provides a high-pressure gas flow rapid pressure reduction fairing device and method. The high-pressure gas flow rapid pressure reduction fairing device is of a revolving body structure,and sequentially comprises an inlet flange (1), a supersonic speed shock wave section (2), a straight section (5), a convergence section (10) and an outlet flange (11) along the gas flow direction. After a gas flow enters the device, the total pressure is rapidly reduced through two times of shock waves, and after multiple times of fairing treatment, the gas flow speed and uniformity are accurately controlled. The flow quality of fuel gas can be comprehensively improved, and proper gas flow inlet parameter conditions are provided for non-toxic treatment of downstream fuel gas.

Description

technical field [0001] The invention belongs to the technical field of detoxification treatment of harmful gases, and relates to a pretreatment method for detoxification of harmful gases, in particular to a device and method for rapid decompression and rectification of high-pressure gas flow. Background technique [0002] Normal temperature propellants such as unsymmetrical dimethylhydrazine and dinitrogen tetroxide are widely used in aerospace propulsion systems, and have the advantages of reliable ignition, stable combustion, and convenient storage and transportation. A large amount of incompletely decomposed oxygen-enriched gas will be produced during the research test of this type of engine. Due to the high toxicity of this type of propellant and its incompletely decomposed products, it is necessary to use combustion gas during the semi-system test of the afterburning cycle engine. Methods It is non-toxic and real-time treatment to meet the emission requirements of green...

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Problems solved by technology

[0004] Referring to the domestic and foreign documents related to the scheme, the flow medium suitable for the existing rectification device products is mostly air medium with low speed, normal temperature and normal pressure. The design purpose of the scheme is equal pressure rectification, although the rectification device will bring a certain total pressure loss, but the decompression of the airflow is not the main purpose, because the existing required volume flow rate is relatively small, the requirements for the space occupied by the rectification device are not strict

However, the gas produced by the joint test of the supplementary combustion cycle semi-system has the characteristics of large flow rate, high temperature (above 600K), high pressure (above 20MPa), complex components, and variable flow. The current rectification methods and devices cannot meet the requirements. Requirements for rapid decompression and rectification of engine gas

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