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Proceedings Paper

Theory and experiments for detecting shock locations
Author(s): S. I. Hariharan; David K. Johnson; Grigory Adamovsky
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Paper Abstract

We present a simplified 1D theory for detecting locations of normal shocks in a converging- diverging nozzle. The theory assumes that the flow is quasi 2D and the flow is accelerated in the throat area. Optical aspects of the model consider propagation of electromagnetic fields transverse to the shock front. The theory consists of an inverse problem in which it reconstructs from the measured intensity an index of refraction profile for the shock. From this profile and the Dale - Gladstone relation, the density in the flow field is determined, thus determining the shock location. Experiments show agreement with the theory. In particular, the location is determined within 10 percent of accuracy. Both the theoretical as well as the experimental results are presented to validate the procedures in this work.

Paper Details

Date Published: 18 March 1994
PDF: 11 pages
Proc. SPIE 2122, Laser Applications in Combustion and Combustion Diagnostics II, (18 March 1994); doi: 10.1117/12.171292
Show Author Affiliations
S. I. Hariharan, Univ. of Akron (United States)
David K. Johnson, Univ. of Akron (United States)
Grigory Adamovsky, NASA Lewis Research Ctr. (United States)

Published in SPIE Proceedings Vol. 2122:
Laser Applications in Combustion and Combustion Diagnostics II
Randy J. Locke, Editor(s)

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