Embedded pressure-sensitive coating measurement test system and test method

Abstract

The invention discloses an embedded pressure-sensitive coating measurement test system and method. The embedded pressure-sensitive coating measurement test system comprises an imaging device used for achieving pressure-sensitive coating fluorescence image acquisition and excitation light sources used for providing excitation light irradiation of a pressure-sensitive coating coating, wherein the excitation light sources are distributed around the imaging device, a pressure-sensitive paint coating fluorescence image acquired by the imaging device is transmitted to the image acquisition computer, and the image acquisition computer calculates surface pressure distribution data of an internal flow channel of the wind tunnel test model. According to the test method and the test system, a solution is provided for the problem of pressure distribution data measurement of the pressure-sensitive coating on the surface of an internal flow field model such as an air inlet channel.

Description

technical field [0001] The invention relates to the field of aerodynamic tests, in particular to an embedded pressure-sensitive coating measurement test system and method. Background technique [0002] Pressure-sensitive paint pressure measurement technology is a non-contact optical pressure measurement technology with broad development prospects. It has the characteristics of small interference to the flow field and high spatial resolution. It is widely used in various wind tunnel pressure measurement tests abroad. middle. [0003] However, the pressure-sensitive coating test is mainly used for aircraft outflow to measure the pressure distribution data on the surface of the model. There is also a strong demand for the measurement of model surface pressure distribution data in internal flow channels such as inlet channels. For the measurement scene of inflow pressure-sensitive paint, one way is usually to open a hole in the model and use an endoscope to insert it into the ...

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Problems solved by technology

These two methods have relatively large defects. The first method needs to place the endoscope and camera in the wind tunnel flow field, and there are huge safety hazards in the high-speed wind tunnel. Although the second method can avoid Potential safety hazards, but the internal and external surfaces of the air intake of the aircraft are irregular, and the processing of optical glass is difficult and costly. For some complex air intakes, this method cannot be implemented

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