Wind tunnel flow field observation system

Abstract

The invention discloses a wind tunnel flow field observation system which comprises a wind tunnel device, a displacement control device used for controlling the position movement of an object model in the wind tunnel device, a tracer particle generation device used for adding tracer particles to the wind tunnel device, a light source device used for shining light to the wind tunnel device, a shooting device used for shooting images of the flow field in the wind tunnel device, and an image processing device used for constructing a three-dimensional flow field structure image according to a sequence of flow field images shot by the shooting device and the position information of the object model recorded by the displacement control device. According to the wind tunnel flow field observation system of the invention, the position movement of the object model in the wind tunnel device is controlled by the displacement control device, a sequence of flow field images of the wind tunnel device are shot, a three-dimensional flow field structure image is constructed according to a sequence of flow field images shot and the position information of the object model recorded by the displacement control device, and therefore, the three-dimensional flow field structure of the flow field in the wind tunnel is obtained.

Description

technical field [0001] The invention relates to the technical field of fluid power, in particular to a wind tunnel flow field observation system. Background technique [0002] Wind tunnel test refers to an aerodynamic experiment method in which an object model, such as an aircraft, is set up in a wind tunnel to study gas flow and its interaction with the model to understand the aerodynamic characteristics of the actual object. Wind tunnel tests not only play an important role in the research and development of aerospace engineering, but also are widely used in transportation, wind energy utilization, etc. [0003] Flow field observation refers to the use of physical or chemical flow field display means to make the colorless and transparent airflow in a hypersonic / supersonic wind tunnel into a visible airflow for observation, recording and analysis. Using the flow field observation method, the physical image of the gas flow can be directly observed, thereby deepening the und...

AI Technical Summary

Problems solved by technology

For the traditional observation method of adding liquid, the structure of the gas flow field may be affected, and the three-dimensional flow field structure cannot be obtained from the image; for the flow field observation method of adding particles, such as planar nanoparticle tracking Rayleigh scattering technology, particle velocity measurement Technology, etc., can only obtain the flow field structure of a certain plane of the flow field, and cannot obtain the three-dimensional structure of the flow field in one test

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