A portable wind tunnel test support device with adjustable attack angle and two degrees of freedom elastic support

Abstract

The invention discloses a portable wind tunnel test support device with an adjustable angle of attack two-degree-of-freedom elastic support, which includes a square frame structure, the upper part of which can be installed with any model to be tested, and the angle of attack between the rib at the root of the model and the upper part of the device can be adjusted The device is connected, and the rotating shaft at the root of the model is connected with the top slider of the support device through bearings. This device provides translational degrees of freedom in the front-to-back direction and rotational degrees of freedom about a vertical axis of rotation. The angle of attack of the model to be tested is adjusted by the angle of attack adjustment mechanism of the device, the pitch stiffness is adjusted by the pitch adjustment mechanism of the device, and the heave stiffness is adjusted by the heave adjustment mechanism of the device. The device can be adjusted in height as required and has an extended position for installing other measuring equipment. The device of the present invention is flexible and convenient, can quickly adjust the initial angle of attack, pitch stiffness, ups and downs stiffness, installation height, etc., can provide linear elastic support stiffness with two degrees of freedom, and is suitable for aircraft wing classic flutter, stall flutter, and rigid-elastic coupling Wind tunnel tests for response or stability.

Description

technical field [0001] The invention belongs to the field of aviation vehicle design and fluid mechanics experiment, and relates to a portable wind tunnel test support device with adjustable attack angle and two-degree-of-freedom elastic support. Background technique [0002] The original experimental support device for the simulation of aerodynamic stall and two-degree-of-freedom wing motion in the wind tunnel mainly has the following problems: [0003] 1. The aerodynamic characteristics have a lot to do with the initial angle of attack and equilibrium position of the wing. It is not satisfactory enough on how to design the convenient and accurate adjustment and measurement of the initial angle of attack and equilibrium position. [0004] 2. The aerodynamic characteristics are closely related to the ups and downs stiffness and torsional stiffness of the wing. It is not satisfactory enough to design how to realize the accurate adjustment of the ups and downs stiffness and to...

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Problems solved by technology

[0003] 1. The aerodynamic characteristics have a lot to do with the initial angle of attack and the equilibrium position of the wing. How to design the convenient and accurate adjustment and measurement of the initial angle of attack and equilibrium position is not satisfactory enough.

[0004] 2. The aerodynamic characteristics have a lot to do with the ups and downs stiffness and torsional stiffness of the wing. How to design it to achieve accurate adjustment of the ups and downs stiffness and torsional stiffness and to ensure its linearity under experimental conditions is not satisfactory enough.

[0005] 3. Designing support devices individually for each experiment lacks versatility; usually has a large volume, which brings difficulties to transportation and installation

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