Method for correcting interference of high-speed wind tunnel tail support to lateral directional aerodynamic characteristics

Abstract

The invention provides a method for correcting interference of high-speed wind tunnel tail support to lateral directional aerodynamic characteristics, which is a method for correcting interference of tail support in high-speed wind tunnel test to lateral directional aerodynamic characteristics. The method comprises the following steps: firstly, using a variable sideslip angle blade belly support device to enable a test model to be pre-deviated to a set sideslip angle, then using a fake tail support moving device to enable a fake tail support and the test model to keep synchronous sideslip angle pre-deviation so as to simulate true relative position relation in tail support test, and then obtaining the lateral directional aerodynamic characteristics interfered by the test model with the fake tail support; and subsequently, dismantling the fake tail support and an accessory device thereof, and carrying out wind tunnel test by keeping same test conditions to obtain the lateral directional aerodynamic characteristics of the test model without the tail support. At the same angle of incidence, the difference between the lateral directional aerodynamic coefficients of structures of two test models is considered to be the influence quantity of interference of the tail support at the set sideslip angle to the lateral directional aerodynamic characteristics, and then correction on the interference of the lateral directional support of data of tail support test can be completed, so that accurate model aerodynamic force and moment can be obtained.

Description

technical field [0001] The invention belongs to the technical field of wind tunnel tests, and in particular relates to a high-speed wind tunnel tail support transverse direction aerodynamic characteristic interference correction method. Background technique [0002] Wind tunnel test is the main means to obtain the aerodynamic characteristics of aircraft. In high-speed wind tunnel tests, the aircraft model is generally fixed in the test section with a tail support. Different from the aircraft flying in the real atmosphere, the flow field around the tail support will interfere with the flow of the rear body, horizontal tail and vertical tail surface of the test model, and then affect the vertical and horizontal aerodynamic characteristics of the test model. In order to accurately obtain the aerodynamic force and moment of the aircraft model under the condition of incoming flow, the support interference correction must be carried out through experiments. At present, in high-s...

AI Technical Summary

Problems solved by technology

However, the above-mentioned supporting device cannot realize the continuous change of sideslip angle, and the false tail support is usually fixed on the wind tunnel scimitar or bracket, which cannot keep the side-slip angle pre-bias synchronously with the model. Therefore, the traditional tail support interference correction method It only corrects the longitudinal aerodynamic characteristics of the test model, and does not yet have the ability to correct the interference of lateral and lateral aerodynamic characteristics

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