4 November 2016 Four-dimensional visualization of a small-scale flame based on deflection tomography
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Optical computed tomography is an important technique in the visualization and diagnosis of various flow fields. A small-scale diffusion flame was visualized using deflection tomography. A projection sampling system was proposed for deflection tomography to obtain deflectograms with a pair of gratings. Wave-front retrieval was employed for processing the deflectograms to obtain the deflection angles of the rays. This two-dimensional data extraction method expanded the application of deflection tomography and was suitable for the projection extraction of small-scale combustion. Deflection angle revision reconstruction algorithm was used to reconstruct the temperature distributions in 10 cross sections for each deflectogram in different instants. The flow structure was reconstructed using a visualization toolkit equipped with the marching cube and ray casting algorithms. The performed experiments demonstrated the three-dimensional dynamic visualization of temperature distributions and the flame structures of small-scale diffusion combustion.
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Bin Zhang, Bin Zhang, Zhigang Liu, Zhigang Liu, Minmin Zhao, Minmin Zhao, } "Four-dimensional visualization of a small-scale flame based on deflection tomography", Proc. SPIE 10026, Real-time Photonic Measurements, Data Management, and Processing II, 100260N (4 November 2016); doi: 10.1117/12.2246539; https://doi.org/10.1117/12.2246539

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