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A wind tunnel test device and method for a high-speed aircraft with a forced transition device

A high-speed aircraft, wind tunnel test technology, applied in the direction of measuring device, aerodynamic test, machine/structural component test, etc., can solve the problem that the natural transition wind tunnel simulation criterion cannot be used, the forced transition simulation criterion, and the effective transition simulation criterion cannot be adopted. Inconsistencies in test methods and transition mechanisms

Active Publication Date: 2019-06-11
BEIJING AEROSPACE TECH INST
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AI Technical Summary

Problems solved by technology

[0004] Due to the inconsistency of the transition mechanism between the forced transition test and the traditional natural transition, there is a large deviation in the simulation criteria of the natural transition wind tunnel test.
As for the low-speed forced transition test, due to the differences in the factors affecting the transition at high speed and low speed, the forced transition device test at high speed cannot directly adopt the low-speed simulation criterion.
[0005] To sum up, for the wind tunnel test method of high-speed aircraft with forced transition device, due to the inconsistency of the transition mechanism, the wind tunnel simulation criterion of natural transition and the forced transition simulation criterion of low speed cannot be used. How to carry out the ground test of forced transition , there is currently no effective test method

Method used

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  • A wind tunnel test device and method for a high-speed aircraft with a forced transition device
  • A wind tunnel test device and method for a high-speed aircraft with a forced transition device
  • A wind tunnel test device and method for a high-speed aircraft with a forced transition device

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Embodiment Construction

[0052] The present invention will be described in detail below in conjunction with specific examples and accompanying drawings.

[0053] The present invention as figure 2 shown in the following steps:

[0054] 1. Determine the simulation criteria for wind tunnel tests

[0055] (1) Determine the test wind tunnel

[0056] According to the flight state of the aircraft, select the Ma, angle of attack and wind tunnel that can cover the flight state and the 1:1 geometric scale of the aircraft.

[0057] (2) Obtain the height of the forced transition device in the wind tunnel test

[0058] Determine the state of the wind tunnel test, which includes Ma, Reynolds number, angle of attack and incoming flow turbulence;

[0059] Since the turbulence of the incoming flow has a great influence on the transition, and the turbulence of the incoming flow differs greatly between the flight condition and the wind tunnel condition on the ground, the turbulence of the incoming flow in the wind ...

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Abstract

The invention provides a wind tunnel test device and method for a high-speed aircraft with a forced transition device. The test device comprises a wind tunnel, a high-speed aircraft model and a forcedtransition device model, the forced transition device model is mounted on the high-speed aircraft model in a corresponding installation position. Test criteria suitable for the high-speed aircraft with the forced transition device are determined to realize wind tunnel test for the high-speed aircraft with the forced transition device; and the test device takes forced transition difference betweena flight state and a wind tunnel state into full consideration, the forced transition device model is corrected, and thus, the wind tunnel test can reflect the flight state accurately.

Description

technical field [0001] The invention relates to a high-speed aircraft wind tunnel test equipment and method with a forced transition device, and belongs to the technical field of high-speed aircraft aerodynamic analysis. Background technique [0002] At present, the air-breathing high-speed aircraft (aircraft with a Mach number exceeding 5) is powered by a scramjet engine, and whether the scramjet engine can work stably determines the success or failure of the flight test. In order to ensure the stable operation of the scramjet, a common method is to install a forced transition device on the lower surface of the aircraft precursor. The forced transition device is a row of devices made up of basic units one by one. The shape of the basic unit includes triangular, cylindrical and such as figure 1 Diamond, swept slope, etc. shown [0003] After the shape design of the forced transition device of the air-breathing high-speed aircraft for the shape of the lifting body is compl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M9/08G01M9/02
CPCG01M9/02G01M9/08
Inventor 罗金玲吴宁宁朱国祥周丹
Owner BEIJING AEROSPACE TECH INST
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