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High-pressure gas flow control device for wind tunnel test

A flow control device and high-pressure gas technology, applied in the direction of measuring device, aerodynamic test, machine/structural component test, etc., can solve problems such as difficult to meet high precision and wide range, difficult to replace the sonic nozzle, low measurement accuracy, etc. Achieve the effects of avoiding the reduction of measurement accuracy, simple structure, and widening the measurement range

Active Publication Date: 2021-11-26
INST OF MECHANICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large influence of the flow state of the medium in the pipeline, the measurement accuracy is low; the sonic nozzle is not easy to replace, resulting in a narrow measurement range, and it is difficult to meet the high-precision and wide-range requirements of the hypersonic wind tunnel for the medium supply capacity of the heater gas supply system. need

Method used

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  • High-pressure gas flow control device for wind tunnel test
  • High-pressure gas flow control device for wind tunnel test
  • High-pressure gas flow control device for wind tunnel test

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Embodiment 1

[0034] Such as figure 1 As shown, this embodiment takes the high-pressure gas flow control device for wind tunnel tests with a connecting pipe of φ30 and a maximum nozzle throat of φ6.5 as an example, including a rear transition section 1, a nut pressure cap 2, a sonic nozzle 4, and a nozzle The transition section 5, the steady flow chamber 8, the front transition section 9, the gasket 3, the pressure measurement connector 7 and the temperature measurement connector 6, the front end of the rear transition section 1 is connected to the downstream pressure pipeline, and the nozzle turns The sonic nozzle 4 is installed on the connection section 5, and the front and rear ends of the sonic nozzle 4 are respectively provided with sealing gaskets 3, and the sonic nozzle 4 and the rear transition section 1 are clamped by the nut pressing cap 2. More specifically, the nut pressing cap 2 It is threadedly connected with the nozzle adapter section 5, and the front transition section 9 is ...

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Abstract

The invention belongs to the technical field of hypersonic ground tests, and aims to provide a high-pressure gas flow control device for a wind tunnel test in order to solve the technical problem of low measurement precision in the prior art, and the high-pressure gas flow control device sequentially comprises a rear transition section, a nozzle switching section, a steady flow cavity and a front transition section, the front end of the rear transition section is connected with a downstream pressure pipeline, the sonic nozzle is installed on the nozzle switching section, the sealing gaskets are arranged at the front end and the rear end of the sonic nozzle respectively, the sonic nozzle and the rear transition section are clamped through the nut pressing cap, and the nozzle switching section, the flow stabilizing cavity and the front transition section are sequentially connected. The measurement precision and accuracy are improved, and the application range is wide; and unnecessary error data caused by non-concentricity of the sonic nozzle and the steady flow cavity during installation is avoided. The installation precision of the flowmeter is improved; and the device is simple in structure, good in repeatability, small in flow pressure loss and easy to replace, and widens the measurement range.

Description

technical field [0001] The invention belongs to the technical field of hypersonic ground tests, and in particular relates to a high-pressure gas flow control device for wind tunnel tests. Background technique [0002] Hypersonic combustion wind tunnel is one of the most important large-scale equipment in the development process of hypersonic vehicle / engine, and the heater gas supply system is an important guarantee system to provide high-pressure gas for blowing test in hypersonic wind tunnel. The combustion heater adopts a three-component combustion heating method of combustible gas (such as hydrogen), oxygen and air to obtain the required total temperature and total pressure of the airflow, and make the oxygen molar composition in the mixed gas 21%. Obviously, how to ensure the precise control of the flow of each medium directly affects the quality of the wind tunnel flow field and is an important factor to ensure the reliability and accuracy of the wind tunnel test result...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M9/06
CPCG01M9/065
Inventor 高占彪孟东东张旭岳连捷
Owner INST OF MECHANICS - CHINESE ACAD OF SCI
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