Application of photogrammetry to surface flow visualization |
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Authors: | N Karthikeyan L Venkatakrishnan |
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Institution: | (1) Experimental Aerodynamics Division, National Aerospace Laboratories, Council of Scientific and Industrial Research, Delhi, India; |
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Abstract: | The construction of three-dimensional surface flow fields is an extremely difficult task owing largely to the fragmented information
available in the form of 2D images. Here, the method of photogrammetric resection based on a comprehensive camera model has
been used to map oil flow visualization images on to the surface grid of the model. The data exported in the VRML format allow
for user interaction in a manner not possible with 2D images. The technique is demonstrated here using the surface oil flow
visualization images of a simplified landing gear model at low speed in a conventional wind tunnel without any specialized
rigs for photogrammetry. The results are not limited to low-speed regimes and show that this technique can have significant
impact on understanding the flow physics associated with the surface flow topology of highly three-dimensional separated flows
on complex models. |
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Keywords: | |
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