Hypersonic wind tunnel model attitude angle measurement method based on schlieren images
A measurement method and model attitude technology, which can be used in image enhancement, image analysis, measurement devices, etc., to solve problems such as extra design and installation space and increase the uncertainty of measurement results.
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[0073] Taking a test in a hypersonic wind tunnel as an example, the whole process of model angle-of-attack schlieren image measurement is described in detail.
[0074] Such as figure 2 As shown, the schlieren system in the hypersonic wind tunnel uses the deflection of light generated by the inhomogeneity of the air medium to image the flow field, and is currently the most frequently used flow display tool in wind tunnel tests. The reflective parallel light schlieren system is mostly used in the schlieren system in the hypersonic wind tunnel. It can be seen from the figure that the light emitted from the point light source becomes a parallel beam after passing through the reflector 1, and the parallel beam passes through the optical observation window of the test section and reaches the reflector 2. Part of the light source image is cut off and finally imaged by the camera lens. Due to the parallel beam between the two mirrors, opaque model areas can be accurately projected ...
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