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Low-temperature wind tunnel system

A wind tunnel and low-temperature technology, which is applied in the field of simulation experiments in low-temperature environmental chambers, can solve problems affecting the quality of the flow field, affecting the airflow profile, and the difficulty of maintaining a balance between the temperature, pressure, and flow velocity of the cave body, etc., so as to improve the quality of the flow field, The effect of reducing energy consumption

Inactive Publication Date: 2020-07-14
COMAC +1
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Problems solved by technology

In this way, since the surface temperature of the heat exchanger is significantly lower than the freezing point, the surface of the heat exchanger will be frosted and frozen, which will affect the heat exchange efficiency and airflow temperature control
At the same time, the components of the ice wind tunnel body will also freeze due to the liquid water in the wind tunnel, which will have a great impact on the flow characteristics of the wind tunnel, increase resistance, affect the airflow profile, and then affect the quality of the flow field, and even the temperature of the tunnel body, Pressure, flow rate, etc. are difficult to maintain balance and cannot be controlled, causing the wind tunnel to be shut down. Therefore, anti-icing is one of the issues that must be considered in the design of the icing wind tunnel system

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with specific embodiment and accompanying drawing, set forth more details in the following description so as to fully understand the present invention, but the present invention can obviously be implemented in many other ways different from this description, Those skilled in the art can make similar promotions and deductions based on actual application situations without violating the connotation of the present invention, so the content of this specific embodiment should not limit the protection scope of the present invention.

[0036] figure 1 A schematic diagram of a low temperature wind tunnel system 10 according to a preferred embodiment of the present invention is shown. The low-temperature wind tunnel system 10 mainly includes a refrigeration device 20 for generating low-temperature gas, a gas pipeline 30 for flowing the low-temperature gas, and an airflow driving device for making the low-temper...

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Abstract

The invention relates to a low-temperature wind tunnel system. The system includes: a refrigeration device configured to generate a cryogenic gas, a gas pipeline provided with a test section, an atomization spraying device, and an airflow driving device configured to drive the air in the air conveying pipeline to advance to the test section by utilizing the low-temperature air generated by the refrigerating device, wherein the airflow driving device is an ejector, the refrigerating device generates low-temperature gas through air circulation refrigeration, the low-temperature gas serves as a main flow of the ejector to be fed into the ejector, air in the air conveying pipeline is driven to advance to the test section along the air conveying pipeline and is mixed with air in the air conveying pipeline, so that the temperature of the test section is reduced. By adopting the low-temperature wind tunnel system, the adverse effect of freezing on an airflow driving device in the wind tunnelsystem can be effectively avoided, and the working stability of the wind tunnel system is effectively ensured.

Description

technical field [0001] The invention relates to the technical field of simulation tests for low-temperature environment chambers such as ice wind tunnels or low-temperature wind tunnels, and more particularly, the invention relates to a low-temperature wind tunnel system. Background technique [0002] Aircraft icing is the main meteorological factor leading to aircraft accidents. Therefore, the flight airworthiness regulations of various countries (including CCAR25 in my country and FAR25 in the United States) regard aircraft icing as an important airworthiness regulation. From the perspective of scientific research, aircraft icing is a crystallization process in a strong convective environment, and it is the intersection of aircraft aerodynamics and condensed matter physics. Therefore, countries around the world have carried out extensive research on the mechanism and impact of aircraft icing , which uses the icing wind tunnel to study the aircraft icing problem on the grou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M9/02G01M9/04
CPCG01M9/02G01M9/04
Inventor 居世超周琼瑶张新太刘鑫鑫
Owner COMAC
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