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Jet reflection velocity field test method

A test method, reflection velocity technology, applied in the field of high-temperature and high-speed fluid flow research

Active Publication Date: 2015-07-22
SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Solve the test problem of high-temperature high-speed jet flow meeting the baffle to generate jet reflection velocity field

Method used

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  • Jet reflection velocity field test method

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Experimental program
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Embodiment Construction

[0034] The present invention will be further described below in conjunction with accompanying drawing and aero-engine jet reflection test implementation case:

[0035] see figure 1 , is the functional block diagram of the test system. The velocity field test system consists of three sets of five-hole probes, scanning valves and data acquisition and recording systems. Each group of five-hole probes is installed on the soil-shaped test rake bracket according to the designed position.

[0036] see figure 2 , is a schematic diagram of jet reflection under a 60° baffle. In the test, the size of the deflector is 3 × 6 meters, and the angle with the ground is 60°, and the angle with the plane of symmetry is 75°.

[0037] see image 3 , Schematic diagram of post-optimized rake arrangement. The baffle not only has a certain angle with the ground, but also deflects a certain angle with the symmetrical plane. Arranged as shown in the figure, the backflow of the left air inlet is ...

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Abstract

The invention belongs to the field of high-temperature high-speed fluid flow researches and particularly relates to a high-temperature high-speed jet reflection velocity field test method. The method is characterized by including firstly, processing an H-shaped test rake, secondly, preparing test equipment, thirdly, starting test after synchronizing a system clock with a jet generator, fourthly, processing data, and fifthly performing analysis and computation. The method has the advantages that the number of measuring points, test data volume and test start-up times are reduced to a bearable range of an external field; the ground of the external field is undestroyed while steadiness of the test rake is guaranteed, and the problem about influence on a plastic piezometric tube due to condensation and high temperature of the external field is solved; a multi-channel acquisition delay unloading method is adopted for massive real-time high-frequency dynamic sampling data, the problem of lack of bandwidth and rate of a data acquisition and storage system is solved, meanwhile data accuracy is improved, start-up times of a jet device are reduced, and test cost is saved; the problem about one-to-one correspondence of the test data and jet states is solved; and a set of data acquisition, processing and analysis method is established.

Description

technical field [0001] The invention belongs to the research field of high-temperature and high-speed fluid flow, and in particular relates to a test method for high-temperature and high-speed jet reflection velocity field. Background technique [0002] Gas rudders in rockets, binary nozzles of vector thrust engines, acetylene flame welding, iron and steel smelting, research on spray effects of dry powder fire extinguishers, etc. will encounter reflection problems of high temperature, high pressure, and high speed jets. The research on the test method of the high-temperature and high-speed reflection flow field has certain reference significance for the research of these problems. Contents of the invention [0003] The purpose of the present invention is: [0004] Solve the test problem of the jet reflection velocity field generated by the high-temperature high-speed jet encountering the baffle. [0005] Technical scheme of the present invention is: [0006] A jet refle...

Claims

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Application Information

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IPC IPC(8): G01M10/00
Inventor 潘英孟轩张立夫张召明
Owner SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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