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Optics Letters

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  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 9 — May. 1, 2014
  • pp: 2771–2774

Vibrationally excited NO tagging by NO(A2Σ+) fluorescence and quenching for simultaneous velocimetry and thermometry in gaseous flows

Rodrigo Sánchez-González, Rodney D. W. Bowersox, and Simon W. North  »View Author Affiliations


Optics Letters, Vol. 39, Issue 9, pp. 2771-2774 (2014)
http://dx.doi.org/10.1364/OL.39.002771


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Abstract

We present measurements demonstrating simultaneous determination of velocity and temperature using a variant of the Vibrationally Excited Nitric Oxide Monitoring (VENOM) technique that does not employ NO2. The variant is based on tagging by electronic excitation of NO in the A2Σ1/2+(v=0)X2Π1/2(v=0) band and subsequent formation of vibrationally excited NO(X2Π) by spontaneous emission and collisional quenching. Sequential planar laser-induced fluorescence imaging of the nascent NO(X2Π,v=1) was used to obtain spatially resolved average streamwise velocity and rotational/translational temperature. The temperature determination using this approach extends the applicability of the VENOM technique to low-density, high-speed flows, where slow thermalization of the tagged molecules represents a limiting factor.

© 2014 Optical Society of America

OCIS Codes
(120.1740) Instrumentation, measurement, and metrology : Combustion diagnostics
(120.6780) Instrumentation, measurement, and metrology : Temperature
(120.7250) Instrumentation, measurement, and metrology : Velocimetry
(300.2530) Spectroscopy : Fluorescence, laser-induced

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: February 27, 2014
Revised Manuscript: March 28, 2014
Manuscript Accepted: March 28, 2014
Published: April 30, 2014

Citation
Rodrigo Sánchez-González, Rodney D. W. Bowersox, and Simon W. North, "Vibrationally excited NO tagging by NO(A2Σ+) fluorescence and quenching for simultaneous velocimetry and thermometry in gaseous flows," Opt. Lett. 39, 2771-2774 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-9-2771


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