Follow-up compensation mechanism for continuous variable sideslip angle wind tunnel test

Abstract

The invention discloses a follow-up compensation mechanism for a continuous variable sideslip angle wind tunnel test, and belongs to the technical field of aerodynamic wind tunnel tests. The follow-up compensation mechanism comprises a left movable assembly and a right movable assembly; the left movable assembly comprises a first linear guide rail used for being fixedly connected with a wind tunnel, a first sliding block matched with the first linear guide rail, a second linear guide rail used for being fixedly connected with the wind tunnel, a second sliding block matched with the second linear guide rail, a left movable plate, a left sliding block and a left shifting fork shaft. The first linear guide rail and the second linear guide rail are arranged in parallel, the first sliding block is arranged on the first linear guide rail and can relatively slide along the first linear guide rail, and the second sliding block is arranged on the second linear guide rail. According to the invention, the structure vacancy occurring in the local part of the wind tunnel can be compensated in real time in a follow-up manner when the model supporting mechanism does transverse linear motion or does rotary motion around the fixed central point of the wind tunnel.

Description

technical field [0001] The invention relates to the technical field of aerodynamic wind tunnel tests, in particular to a follow-up compensation mechanism for wind tunnel tests with continuously variable sideslip angles. Background technique [0002] The change law of the aircraft lateral force (moment) with the sideslip angle is the key to evaluate the aerodynamic characteristics of the basic lateral direction. The test is carried out by changing the sideslip angle at a constant angle of attack. At present, the main methods that can realize this operating condition include There are three types of attitude angle coupling method, double axis method and double degree of freedom method. [0003] Among them, the attitude angle coupling method uses the angle of attack mechanism and the roll angle mechanism around the axis of the strut to realize the sideslip angle of the model. When the angle of attack of the model is different, the position of the lift surface of the model in th...

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Problems solved by technology

In this way, the sideslip angle of the model is changed by rotating the model and the support system around the fixed point of the wind tunnel. During operation, the support mechanism will be biased to one side of the central axis, and there will be structural vacancies in the wall plate of the test section, which will affect the flow field in the model area. Uniformity and followability of flow field adjustment, and ultimately affect the accuracy of test data

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