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Proceedings Paper

Animated display of sequential holographic interferograms of shock-wave/vortex interaction in a confined space
Author(s): Atsushi Abe; Kazuyoshi Takayama; Osamu Onodera; Hidenori Ojima; Toshihiro Ogawa
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Paper Abstract

Paper demonstrates dynamic observation of the interaction of a shock wave with a vortex in a confined space by an animated display of sequential holographic interferograms. In conventional flow visualization methods, high speed photogrametry is a useful tool to observe high speed flows but its spatial resolution is somewhat limited. Holographic interferometry, on the contrary, can produce image information with a very high spatial resolution but only provides those at a specified time instant. In order to secure a dynamic display of shock wave phenomena, sequential interferograms must be taken successively at a given delay time in a shock tube which has a higher degree of repeatability. Experiments were conducted in a 60 mm X 150 mm shock tube at shock Mach number of 1.2 in air. Double exposure holographic interferograms were taken at every 5 microsecond time delay and a series of more than 30 interferograms was sequentially re-arranged on a computer so as to animate the interferograms. The animated result was then compared with a numerical simulation using a finite difference method with shock adaptive unstructured grids.

Paper Details

Date Published: 22 June 1999
PDF: 10 pages
Proc. SPIE 3516, 23rd International Congress on High-Speed Photography and Photonics, (22 June 1999); doi: 10.1117/12.350504
Show Author Affiliations
Atsushi Abe, Tohoku Univ. (Japan)
Kazuyoshi Takayama, Tohoku Univ. (Japan)
Osamu Onodera, Tohoku Univ. (Japan)
Hidenori Ojima, Tohoku Univ. (Japan)
Toshihiro Ogawa, Tohoku Univ. (Japan)

Published in SPIE Proceedings Vol. 3516:
23rd International Congress on High-Speed Photography and Photonics
Valentina P. Degtyareva; Mikhail A. Monastyrski; Mikhail Ya. Schelev; Alexander V. Smirnov, Editor(s)

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