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17 April 2001 Interferometric CT technique for three-dimensional shock wave phenomena
Hiroki Honma; Kazuo Maeno; M. Ishihara; T. Yoshimura
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Proceedings Volume 4183, 24th International Congress on High-Speed Photography and Photonics; (2001) https://doi.org/10.1117/12.424326
Event: 24th International Congress on High-Speed Photography and Photonics, 2000, Sendai, Japan
Abstract
An interferometric CT technique is developed to observe three- dimensional phenomena in shock tube experiments, and is applied to investigate three-dimensional features of shock waves and vortices discharged from a square open end. A small duct model is introduced in the test section of the shock tube, and is rotated around its central axis to change the observation angle in order to obtain the finite-fringe interferograms from multi-directions. The CT images of the density distribution are obtained with good quality by carefully selecting the projection data within the limited ranges of the incident shock Mach number Mi and the frontal shock position. The rotation angle is changed from 0 degree to 90 degrees in an interval of 5 degrees. For Mi equals 1.50, the three-dimensional nature of the distortion of vortices and the shape of secondary shock wave are clearly illustrated by pseudo-color images of the density distribution and isopycnic surfaces. The CFD images exhibit a good agreement with the CT images.
© (2001) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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Hiroki Honma, Kazuo Maeno, M. Ishihara, and T. Yoshimura "Interferometric CT technique for three-dimensional shock wave phenomena", Proc. SPIE 4183, 24th International Congress on High-Speed Photography and Photonics, (17 April 2001); https://doi.org/10.1117/12.424326
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