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Proceedings Paper

Instantaneous flow measurements in a supersonic wind tunnel using spectrally resolved Rayleigh scattering
Author(s): Richard G. Seasholtz; Alvin E. Buggele; Mark F. Reeder
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Paper Abstract

Results of a feasibility study to apply laser Rayleigh scattering to nonintrusively measure flow properties in a small supersonic wind tunnel are presented. The technique uses an injection seeded, frequency doubled Nd:YAG laser tuned to an absorption band of iodine. The molecular Rayleigh scattered light is filtered with an iodine cell to block light at the laser frequency. The Doppler-shifted Rayleigh scattered light that passed through the iodine cell is analyzed with a planar mirror Fabry-Perot interferometer used in a static imaging mode. An intensified CCD camera is used to record the images. The images are analyzed at several subregions, where the flow velocity is determined. Each image is obtained with a single laser pulse, giving instantaneous measurements.

Paper Details

Date Published: 29 September 1995
PDF: 14 pages
Proc. SPIE 2546, Optical Techniques in Fluid, Thermal, and Combustion Flow, (29 September 1995); doi: 10.1117/12.221516
Show Author Affiliations
Richard G. Seasholtz, NASA Lewis Research Ctr. (United States)
Alvin E. Buggele, NASA Lewis Research Ctr. (United States)
Mark F. Reeder, NASA Lewis Research Ctr. (United States)

Published in SPIE Proceedings Vol. 2546:
Optical Techniques in Fluid, Thermal, and Combustion Flow
Soyoung Stephen Cha; James D. Trolinger, Editor(s)

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