Instantaneous flow measurements in a supersonic wind tunnel using spectrally resolved Rayleigh scattering

Richard G. Seasholtz; Alvin E. Buggele; Mark F. Reeder

doi:10.1117/12.221516

29 September 1995 Instantaneous flow measurements in a supersonic wind tunnel using spectrally resolved Rayleigh scattering

Richard G. Seasholtz, Alvin E. Buggele, Mark F. Reeder

Author Affiliations +

Proceedings Volume 2546, Optical Techniques in Fluid, Thermal, and Combustion Flow; (1995) https://doi.org/10.1117/12.221516
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

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.

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Richard G. Seasholtz, Alvin E. Buggele, and Mark F. Reeder "Instantaneous flow measurements in a supersonic wind tunnel using spectrally resolved Rayleigh scattering", Proc. SPIE 2546, Optical Techniques in Fluid, Thermal, and Combustion Flow, (29 September 1995); https://doi.org/10.1117/12.221516

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