Device and method for measuring fluorescent oil flow friction force field

Abstract

A device for measuring a fluorescent oil flow friction force field comprises a CCD video camera, an LED light source, a computer, a test wind tunnel and a spraying device, wherein the spraying device is composed of a spraying gun and a high pressure air source which is a nitrogen source, the CCD video camera and the LED light source are respectively installed outside an observation window of the test wind tunnel, the LED light source can irradiate a model testing piece arranged in the test wind tunnel, the CCD video camera can effectively shoot image information of the model testing piece, the LED light source is connected with an external power source through a wire, an information output end of the CCD video camera is connected with a corresponding interface of the computer through a cat6 network line, and a medium inlet of the spraying gun is connected with a medium outlet of the high pressure air source. By means of the device and method for measuring the fluorescent oil flow friction force field, coatings on the surface of a model can be evenly distributed and can reach a stable state as quickly as possible under the function of a flow field, machining links and machining cost of the model are reduced, measurement cost is greatly reduced, and influence on the flow field on the surface of the model by measurement devices is reduced.

Description

technical field [0001] The invention belongs to a device for measuring the surface relative friction force field of a wind tunnel test model. Background technique [0002] Aircraft drag has always been one of the difficulties and hotspots in aerodynamics research. It is composed of surface frictional resistance, induced drag, pressure difference drag and interference drag. Surface frictional drag is one of the important drag sources. [0003] Frictional resistance is one of the most important and difficult fluid flow parameters to measure. At present, the technology used to measure model surface friction is basically based on single-point measurement technology, which cannot provide global friction resistance; in addition, such as oil film interferometry technology, liquid crystal friction measurement technology, etc., although local Continuous friction force field, but due to its cumbersome and complicated calibration process, it cannot be promoted in wind tunnel tests, an...

AI Technical Summary

Problems solved by technology

At present, the technology used to measure model surface friction is basically based on single-point measurement technology, which cannot provide global friction resistance; in addition, such as oil film interferometry technology, liquid crystal friction measurement technology, etc., although local Continuous friction force field, but due to its cumbersome and complicated calibration process, it cannot be promoted in wind tunnel tests, and cannot provide effective support for model development

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