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

Book · Sun Dec 31 04:00:00 EST 1995

OSTI ID:220724

Seasholtz, R G; Buggele, A E; Reeder, M F ^[1]

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1. National Aeronautics and Space Administration, Cleveland, OH (United States). Lewis Research Center

Results of a feasibility study to apply laser Rayleigh scattering to non-intrusively 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 passes 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.

• OSTI ID: 220724
• Report Number(s): CONF-950793--; ISBN 0-8194-1905-2
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
CHARGE-COUPLED DEVICES
DIAGNOSTIC TECHNIQUES
EXPERIMENTAL DATA
FEASIBILITY STUDIES
LASER RADIATION
NEODYMIUM LASERS
SUPERSONIC FLOW
VELOCITY
WIND TUNNELS