Hole wall opening-closing ratio continuously adjustable device applied to transonic wind tunnel test section

Abstract

The invention discloses a hole wall opening-closing ratio continuously adjustable device applied to a transonic wind tunnel test section. The hole wall opening-closing ratio continuously adjustable device comprises a frame, a fixed plate, a movable plate assembly, a driving mechanism and a pressing mechanism. The frame is fixedly connected with the surface of the fixed plate, the movable plate assembly is slidably installed on the surface of the fixed plate, inclined holes which are evenly arranged in an aligned mode are formed in the movable plate assembly and the surface of the fixed plate, and the movable plate assembly adjusts the opening-closing ratio of the inclined holes through dislocation displacement with the fixed plate; the driving mechanism is used for driving the movable plate assembly to translate; the pressing mechanism enables the movable plate assembly to be tightly attached to the fixed plate. The synchronous spiral elevator drives the swing rod to reciprocate so that the inclined holes which are originally aligned with the fixed plate and the movable plate assembly are staggered, the ventilation rate of the wall plate is adjusted, the opening-closing ratio of the hole wall is continuously adjustable, other hole walls do not need to be replaced, the device is economical and practical, and the test cost is reduced. The mechanical and electrical integration design is adopted, the structure is compact, operation is easy and convenient, the problem of wallboard hoisting and replacing is solved, and the test efficiency is improved.

Description

technical field [0001] The invention relates to the field of aerodynamic wind tunnel tests, in particular to a continuously adjustable device for opening and closing ratios of hole walls applied to the test section of a transonic wind tunnel. Background technique [0002] The research and development of today's aircraft is still inseparable from accurate wind tunnel test data. Due to the limitation of the size of the high-speed wind tunnel test section, the wall interference is an important factor affecting the accuracy of the test data, especially in the transonic model test, the wall interference is more prominent, and the wall interference of the transonic wind tunnel is an important factor in the experimental aerodynamic One of the well-known problems in the flow, the difficulty lies in the complexity of the flow in the transonic range. [0003] Wind tunnel wall interference has always been an important issue that affects the accuracy of wind tunnel test data. There hav...

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Problems solved by technology

[0007] Since the optimal flow field at different flow rates in the wind tunnel corresponds to different opening ratios of the hole walls, the traditional method is to replace the wall panels with different opening ratios. However, this method is costly and inefficient. In order to achieve different opening ratios during the test To optimize the fluency quality under the porosity and improve the test efficiency, there is an urgent need for a hole wall device with a continuously adjustable opening and closing ratio.

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