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

Richard G. Seasholtz | Zendy; A. E. Buggele | Zendy; Mark F. Reeder | Zendy

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

Author(s) -

Richard G. Seasholtz,

A. E. Buggele,

Mark F. Reeder

Publication year - 1995

Publication title -

proceedings of spie, the international society for optical engineering/proceedings of spie

Language(s) - English

Resource type - Conference proceedings

SCImago Journal Rank - 0.192

H-Index - 176

eISSN - 1996-756X

pISSN - 0277-786X

DOI - 10.1117/12.221516

Subject(s) - optics , rayleigh scattering , laser , interferometry , light scattering , materials science , scattering , physics

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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