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Icing wind tunnel pressure measurement test method

A test method and pressure measurement technology, which is applied in the field of wind tunnel tests, can solve the problems of test influence, inability to achieve fixed-point deicing, and damage to ice shape, etc., to achieve the effect of ensuring accuracy

Active Publication Date: 2020-06-05
LOW SPEED AERODYNAMIC INST OF CHINESE AERODYNAMIC RES & DEV CENT
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The result of these two deicing methods is a large area of ​​deicing, and fixed-point deicing cannot be achieved, and the result of deicing will destroy the ice shape, which will affect the test.

Method used

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  • Icing wind tunnel pressure measurement test method
  • Icing wind tunnel pressure measurement test method
  • Icing wind tunnel pressure measurement test method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Such as figure 2 As shown, when ice blowing is required in an icing wind tunnel, a pressure regulating valve and an air source are connected through a joint at one end of the pressure measuring tube, and the pressure measuring tube is directly supplied with a high-pressure air source to make the measured The pressure measuring hole on the model is sprayed out of the model to prevent the sand contained in the blowing test from blocking the pressure measuring hole. In the icing and blowing test, the temperature in the wind tunnel is very low and contains a lot of moisture. Therefore, in order to avoid the freezing of water vapor in the pressure measuring hole, the high-pressure air source adopts a hot air flow with a certain temperature to carry out the pressure measuring hole. Spray to avoid freezing of the pressure tap.

[0052] Such as image 3 As shown, when it is necessary to measure the ice shape on the surface of the tested model in an icy wind tunnel, quickly remov...

Embodiment 2

[0055] On the basis of the first embodiment, in order to improve the measurement accuracy in one step, a connector of the embodiment is designed as a quick connector. The quick connector has multiple input terminals, and the multiple input terminals can be switched and cut off. The scanning valve and the pressure regulating valve can be connected to the quick coupling at the same time through the quick coupling.

[0056] During the test, the high-pressure gas source and the scanning valve are switched in the pressure measurement pipeline by controlling the quick connector, reducing the state delay in the measurement process, and accurately realizing the real-time measurement of the state in the wind tunnel.

[0057] The above two embodiments are aimed at the pressure measurement during the icing process in the icing wind tunnel. For the conventional pressure distribution test and the conventional inlet pressure test, you can participate in the published document "Wang Xunnian et al....

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Abstract

The invention discloses an icing wind tunnel pressure measurement test method. The method is based on an existing icing wind tunnel model icing test. The method comprises: establishing a wind tunnel test method integrating a model icing test and an ice-shaped aerodynamic influence evaluation test, improving the accuracy of a test result is improved while the aerodynamic test efficiency, firstly, installing a pressure measurement model according to a conventional pressure measurement test method, and connecting a pressure measurement hole to a scanning valve quick connector through a pressure measurement hose; calibrating and grouping the pressure values of the pressure measuring holes under different speed pressures; when a cloud-containing pneumatic test is carried out, using an externalair source for supplying pressure and blowing air to the pressure measuring hole; after the outer surface of the model is frozen, closing the pressure measuring hole for air supply, performing a pressure measuring test with an ice shape according to a conventional method, and finally obtaining the aerodynamic characteristics of the ice-shape-containing model. According to the invention, the problem that the pressure measurement test cannot be carried out on the model pressure measurement hole of the icing wind tunnel in a cloud state is solved.

Description

Technical field [0001] The invention relates to the field of wind tunnel testing, in particular to a wind tunnel testing method in a wind tunnel or containing spray, precipitation, blowing sand, icing, etc., which may interfere with the pressure measurement holes of conventional pressure measurement equipment. Background technique [0002] The pressure test in the wind tunnel is a routine test and an essential part of the aircraft design process. Especially in the icing wind tunnel test, the icing test of key aerodynamic parts such as aircraft wings and engine inlets is carried out to obtain surface icing conditions, which can be used as a basis for aerodynamic evaluation after icing. [0003] The existing icing wind tunnel test is to obtain the ice shape of the tested model surface in different icing meteorological environments by blowing air. When the model surface is icing, it is impossible to measure the relevant pressure parameters of the aircraft surface. After the icing is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M9/00G01M9/06
CPCG01M9/00G01M9/06
Inventor 梁鉴胡站伟李东赖庆仁王茂
Owner LOW SPEED AERODYNAMIC INST OF CHINESE AERODYNAMIC RES & DEV CENT
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