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Applied Optics

Applied Optics


  • Vol. 42, Iss. 33 — Nov. 20, 2003
  • pp: 6682–6695

Nitric-oxide planar laser-induced fluorescence applied to low-pressure hypersonic flow fields for the imaging of mixture fraction

Tobias Rossmann, M. Godfrey Mungal, and Ronald K. Hanson  »View Author Affiliations

Applied Optics, Vol. 42, Issue 33, pp. 6682-6695 (2003)

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The scalar-field imaging of a hypersonic mixing flow is performed in a mixing facility that is shock tunnel driven. The instantaneous mixture-fraction field of a hypersonic two-dimensional mixing layer (M1 = 5.1, M2 = 0.3) is determined with a temperature-insensitive planar laser-induced fluorescence technique with nitric oxide (NO) as the tracer species. Single-shot images are obtained with the broadband excitation of a reduced temperature-sensitivity transition in the A2+X2Π1/2 (0, 0) band of NO near 226 nm. The instantaneous mixture-fraction field at a convective Mach number of 2.64 is shown to be nearly identical to a typical diffusive process, supporting the notion of gradient-transport mixing models for highly compressible mixing layers.

© 2003 Optical Society of America

OCIS Codes
(260.2510) Physical optics : Fluorescence
(280.2490) Remote sensing and sensors : Flow diagnostics
(300.2530) Spectroscopy : Fluorescence, laser-induced
(300.6280) Spectroscopy : Spectroscopy, fluorescence and luminescence

Original Manuscript: March 12, 2003
Revised Manuscript: July 31, 2003
Published: November 20, 2003

Tobias Rossmann, M. Godfrey Mungal, and Ronald K. Hanson, "Nitric-oxide planar laser-induced fluorescence applied to low-pressure hypersonic flow fields for the imaging of mixture fraction," Appl. Opt. 42, 6682-6695 (2003)

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