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Icing wind tunnel air supply system and method

An air supply system and wind tunnel technology, which is applied in the field of wind tunnel testing, can solve the problems of unstable air supply temperature and reduce the test efficiency, and achieve the effect of reducing or increasing the number, improving the test efficiency, and avoiding the change of the air supply temperature.

Active Publication Date: 2021-08-13
LOW SPEED AERODYNAMIC INST OF CHINESE AERODYNAMIC RES & DEV CENT
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0006] 1. The hot air anti-icing test in the prior art usually only can perform hot air anti-icing on a single component, and most of its hot air supply systems only have the function of single-channel hot air supply;
[0007] 2. In the prior art, the multi-channel gas supply adopts the closed-loop method of adjusting the opening of the regulating valve and the feedback of the flowmeter to control the flow of each branch. When the flow of each branch changes, the flow at the front end of the system also changes. In this kind of gas supply system In the process, the change of the flow rate at the front end will lead to the instability of the supply air temperature, thus reducing the test efficiency

Method used

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  • Icing wind tunnel air supply system and method

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Embodiment 1

[0040] Such as figure 1 As shown, Embodiment 1 of the present invention provides an icing wind tunnel air supply system, including an air supply main road 100, a simulated main road 200, an air supply bypass 300 and a plurality of air supply branches 400:

[0041] The outlet of the main air supply path 100 is connected to the inlet of the simulated main path 200 and the inlet of the bypass air supply path 300, and the outlet of the simulated main path 200 is connected to the inlets of a plurality of the air supply branches 400 connect;

[0042] A first pressure sensor 220 is provided on the simulated main circuit 200, and a plurality of the gas supply branches 400 are connected in parallel;

[0043] A needle valve 410 , a temperature sensor 430 and a critical venturi 440 are sequentially arranged on the air supply branch 400 along the airflow direction.

[0044] The main gas supply path 100 is used to provide a stable flow rate of gas supply for the icing wind tunnel gas su...

Embodiment 2

[0056] Embodiment 2 of the present invention provides an icing wind tunnel air supply method, such as figure 2 shown, including the following steps:

[0057] Step S10: Turn on the air supply system of the icing wind tunnel, and adjust the flow rate of the main air supply path 100 to Q M ;

[0058] Step S20: Adjust the opening of the needle valve 410 on each air supply branch 400;

[0059] Step S30: Adjust the opening degree of the regulating valve 310 on the air supply bypass 300, so that the pressure value of the first pressure sensor 220 on the simulated main circuit 200 P s keep it steady.

[0060] Further, in step S10, the flow rate of the air supply main circuit 100 Q M =A·Q st ,in, Q st is the sum of the supply air flows, A is flow coefficient, 1.5A Q st for N The sum of the gas flow of the two gas supply branches, N is the total number of gas supply branches.

[0061] Among them, the flow coefficient A is 1.5~2 to facilitate the adjustment of the pressu...

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Abstract

The invention is suitable for the technical field of wind tunnel tests, and provides an icing wind tunnel air supply system and method. The icing wind tunnel air supply system comprises an air supply main path, a simulation main path, an air supply bypass and a plurality of air supply branch paths, and the outlet of the air supply main path is connected with the inlet of the simulation main path and the inlet of the air supply bypass; the outlet of the simulation main path is connected with the inlets of the plurality of gas supply branches; the simulation main circuit is provided with a first pressure sensor, and the plurality of gas supply branches are connected in parallel; a needle valve, a temperature sensor and a critical venturi tube are sequentially arranged on the air supply branch in the airflow direction. According to the icing wind tunnel air supply system and method provided by the invention, the flow of each branch can be quickly adjusted on the basis of ensuring the stability of the air supply system, the change of the air supply temperature on each air supply branch is avoided, and the test efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of wind tunnel tests, and in particular relates to an icing wind tunnel air supply system and method. Background technique [0002] As stated in the Chinese invention patent CN111929025B authorized by the applicant, when an aircraft encounters supercooled water droplets when passing through high-altitude clouds, its windward parts will freeze, resulting in damage to aircraft components, reduced flight performance, and even crashes. death, seriously affecting flight safety. In order to ensure flight safety, it is required to install anti-icing devices on aircraft wings, engine lips, etc. Among them, hot air anti-icing is one of the most commonly used anti-icing methods. In the ice cavity, the heat is transferred to the anti-icing surface to achieve the purpose of anti-icing. [0003] In order to verify the effect of aircraft anti-icing equipment, the hot air supply anti-icing test is usually carried out in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M9/04G01M9/06B64F5/60
CPCB64F5/60G01M9/04G01M9/065
Inventor 赵照熊建军易贤冉林李自雨
Owner LOW SPEED AERODYNAMIC INST OF CHINESE AERODYNAMIC RES & DEV CENT
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