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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 42, Iss. 12 — Apr. 20, 2003
  • pp: 2031–2042

Strategies for Laser-Induced Fluorescence Detection of Nitric Oxide in High-Pressure Flames. II. A–X(0, 1) Excitation

Wolfgang G. Bessler, Christof Schulz, Tonghun Lee, Jay B. Jeffries, and Ronald K. Hanson  »View Author Affiliations


Applied Optics, Vol. 42, Issue 12, pp. 2031-2042 (2003)
http://dx.doi.org/10.1364/AO.42.002031


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Abstract

<i>A</i>–<i>X</i>(0, 1) excitation is a promising new approach for NO laser-induced fluorescence (LIF) diagnostics at elevated pressures and temperatures. We present what to our knowledge are the first detailed spectroscopic investigations within this excitation band using wavelength-resolved LIF measurements in premixed methane/air flames at pressures between 1 and 60 bar and a range of fuel/air ratios. Interference from O<sub>2</sub> LIF is a significant problem in lean flames for NO LIF measurements, and pressure broadening and quenching lead to increased interference with increased pressure. Three different excitation schemes are identified that maximize NO/O<sub>2</sub> LIF signal ratios, thereby minimizing the O<sub>2</sub> interference. The NO LIF signal strength, interference by hot molecular oxygen, and temperature dependence of the three schemes are investigated.

© 2003 Optical Society of America

OCIS Codes
(280.1740) Remote sensing and sensors : Combustion diagnostics
(300.2530) Spectroscopy : Fluorescence, laser-induced

Citation
Wolfgang G. Bessler, Christof Schulz, Tonghun Lee, Jay B. Jeffries, and Ronald K. Hanson, "Strategies for Laser-Induced Fluorescence Detection of Nitric Oxide in High-Pressure Flames. II. A–X(0, 1) Excitation," Appl. Opt. 42, 2031-2042 (2003)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-42-12-2031


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