Quantitative Visualization of High Speed Flow through Optical Tomography
The preferred tool for studying hypersonic flow dynamics is that the technique which uses the noninvasive, light-based flow visualization techniques. Various strategies leading to qualitative as well as quantitative flow visualization such as Shadowgraphy, Schlieren imaging, background oriented Schlieren (BOS), interferometry and laser induced fluorescence(LIF) etc. are reported in literature [1, 2]. Shadowgraphy and Schlieren techniques can give only qualitative information about the flow. Though the Interferometry and LIF can provide quantitative information of the hypersonic flows, the techniques are rather complicated to be used in bigger hypersonic facilities and also require expensive instrumentation such as lasers, CCDs etc. Notwithstanding the above, quantitative information of density gradient around an object facing high-speed flow is an extremely important parameter for studying shock generation and its propagation, which is also important in designing future hypersonic space vehicles.
KeywordsTest Section Shock Tube Laser Induce Fluorescence Schlieren Imaging High Speed Flow
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