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An icing wind tunnel pressure measurement test method

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

Active Publication Date: 2021-07-13
LOW SPEED AERODYNAMIC INST OF CHINESE AERODYNAMIC RES & DEV CENT
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  • Summary
  • Abstract
  • Description
  • 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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  • An icing wind tunnel pressure measurement test method
  • An icing wind tunnel pressure measurement test method
  • An icing wind tunnel pressure measurement test method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Such as figure 2 As shown in icing wind tunnel, when icing blowing is required, one end of the piezometric tube is connected with a pressure regulating valve and an air source through a joint, and the high-pressure air source is directly supplied to the piezometer tube, so that the measured The pressure measuring hole on the model sprays air to the outside of the model to avoid the sand contained in the blowing test from clogging the pressure measuring hole. Because in the icing and blowing test, the temperature in the wind tunnel is very low and contains a lot of water, so in order to prevent the water vapor from freezing in the pressure measuring hole, the high-pressure air source adopts a hot air flow with a certain temperature to carry out the test on the pressure measuring hole. spray, thereby avoiding freezing of the pressure taps.

[0052] Such as image 3 As shown, when it is necessary to measure the pressure of the ice shape on the surface of the tested mode...

Embodiment 2

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

[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 during the measurement process, and accurately realizing the real-time measurement of the state in the wind tunnel.

[0057] The above-mentioned 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 duct pressure measurement test, you can refer to the published document "Wang Xunnian et a...

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Abstract

The invention discloses an icing wind tunnel pressure measurement test method. On the basis of the existing icing wind tunnel model icing test, a wind tunnel that integrates the model icing test and the ice shape aerodynamic impact evaluation test is established. The hole test method will help improve the efficiency of the pneumatic test and improve the accuracy of the test results. First, install the pressure measurement model according to the conventional pressure measurement test method, and connect the pressure measurement hole to the quick connector of the scanning valve through the pressure measurement hose; then Calibrate and group the pressure values ​​of the pressure measuring holes at different speeds and pressures; when carrying out the aerodynamic test with clouds and fog, the pressure measuring holes are supplied with air from an external air source; after the surface of the model freezes, the air supply to the pressure measuring holes is closed, The pressure measurement test with the ice shape is carried out according to the conventional method, and finally the aerodynamic characteristics of the model with the ice shape are obtained; the invention solves the problem that the pressure measurement hole of the model pressure measurement hole of the icing wind tunnel cannot be carried out in the cloud and fog state.

Description

technical field [0001] The invention relates to the field of wind tunnel tests, in particular to a wind tunnel test method in a wind tunnel or in a wind tunnel that includes spray, precipitation, blowing sand, icing, etc. that may interfere with pressure measuring holes of conventional pressure measuring equipment. Background technique [0002] The wind tunnel pressure test is a routine test and an essential part of the aircraft design process. Especially in the icing wind tunnel test, icing tests are carried out on key aerodynamic components such as aircraft wings and engine inlets 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 surface of the tested model under different icing meteorological environments by blowing air. When the surface of the model is icy, it is impossible to measure the relevant pressure parameters on the surface of the ...

Claims

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Application Information

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Patent Type & Authority Patents(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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