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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 37, Iss. 12 — Apr. 20, 1998
  • pp: 2334–2339

Three-line fluorescence thermometry of optically thick shock-tunnel flow

Wim M. Ruyten, Michael S. Smith, Linwood L. Price, and William D. Williams  »View Author Affiliations


Applied Optics, Vol. 37, Issue 12, pp. 2334-2339 (1998)
http://dx.doi.org/10.1364/AO.37.002334


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Abstract

Two-line fluorescence thermometry measurements based on excitation of the AX (0, 0) band of nitric oxide were performed in the free-stream flow of a large-scale shock tunnel, the Arnold Engineering Development Center Impulse Facility. Because the flow is optically thick, effects of laser absorption must be taken into account. This can be accomplished by extending the two-line thermometry concept to three lines. We illustrate the three-line technique by combining two-line planar laser-induced fluorescence measurements from separate facility runs. The resulting free-stream temperature T0 = 468 K ± 65 K is insensitive to assumptions regarding the laser propagation distance through the flow, the vibrational temperature of the flow, and the precise nature of the absorption line shape.

© 1998 Optical Society of America

OCIS Codes
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(260.2510) Physical optics : Fluorescence
(300.2530) Spectroscopy : Fluorescence, laser-induced

History
Original Manuscript: December 8, 1997
Published: April 20, 1998

Citation
Wim M. Ruyten, Michael S. Smith, Linwood L. Price, and William D. Williams, "Three-line fluorescence thermometry of optically thick shock-tunnel flow," Appl. Opt. 37, 2334-2339 (1998)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-12-2334

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