A low-speed wind tunnel flutter test wing model support device

Abstract

A wing model supporting device for a low-speed wind tunnel flutter test comprises a supporting mechanism and a reflecting mechanism. The supporting mechanism comprises two vertical beams, a cross beamand a plurality of supporting slanting beams. The two vertical beams are fixedly mounted between an upper wall board and a lower wall board of a wind tunnel parallelly and vertically, and the multiple corresponding supporting slanting beams are arranged on the two sides of each vertical beam. The cross beam is mounted between the two vertical beams and provided with a model adjusting mechanism which is connected with a wing model of the test. The reflecting mechanism comprises a reflecting board supporting mechanism, a plurality of reflecting boards and a fairing, and the reflecting board supporting mechanism is fixedly mounted on a bottom board of the wind tunnel; and all the reflecting boards are fixedly mounted on the reflecting board supporting mechanism, and the wing model penetratesthrough a through hole of the fairing to be mounted on the model adjusting mechanism. The problem that the model angle cannot be adjusted in the test is solved, the supporting mechanism and the reflecting mechanism are each of an independent supporting structure, the data collecting quality is improved, and the wing model supporting device has the advantages of being high in practicability, ingenious in structure, easy and convenient to dismount and mount and the like.

Description

technical field [0001] The invention relates to a low-speed wind tunnel flutter test wing model support device. Background technique [0002] Flutter is a very dangerous vibration that is caused by aeroelasticity, does not attenuate aircraft components, and has a relatively large amplitude. For aircraft, flutter often causes disastrous consequences of aircraft crashes, so determine the criticality of aircraft flutter. Speed ​​is a critical aspect of aircraft design. As far as the current technical level is concerned, it is too risky and expensive to use real aircraft for flutter tests, and model flutter wind tunnel tests still play an important role in flutter analysis. [0003] For decades, a large number of wind tunnel tests of low-speed flutter models of individual components or combined components have been carried out in China. The method is to fix the model on the side wall turning window mechanism or the lower wall plate of the wind tunnel test section, and use a "f...

AI Technical Summary

Problems solved by technology

However, due to the structural characteristics of some wind tunnels, it is difficult to fix the wing model on the wall of the wind tunnel, so it is necessary to design a new support device for the flutter test of the wing model to meet the needs of the test

In the past, the wing model support devices commonly used in flutter wind tunnel tests mostly used spray-painted wooden boards, and they were a whole board. Since the boards were used for a long time, the paint would fall off, crack or deform, which shortened the use period; the whole board was transported and Removal is cumbersome, and it is difficult to form a reflector with a larger area; usually, the reflector support frame is fixedly connected to the model's installation mechanism, which affects the quality of model data measurement, and cannot realize the adjustment of the large angle of attack of the model

Images