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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 37, Iss. 21 — Jul. 20, 1998
  • pp: 4937–4943

One-dimensional, time-resolved Raman measurements in a sooting flame made with 355-nm excitation

Friedrich Rabenstein and Alfred Leipertz  »View Author Affiliations


Applied Optics, Vol. 37, Issue 21, pp. 4937-4943 (1998)
http://dx.doi.org/10.1364/AO.37.004937


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Abstract

Single-shot vibrational Raman measurements were performed along an 11-mm-long line crossing the reaction zone in a premixed, fuel-rich (ϕ = 10), laminar methane–air flame by use of a frequency-tripled Nd:YAG laser with a 355-nm emission wavelength. This laser source seems to have advantages relative to KrF excimer lasers as well as to Nd:YAG lasers at 532 nm for hydrocarbon combustion diagnostics. The Raman emissions of all major species (N2, O2, CH4, H2, CO2, H2O) were detected simultaneously with a spatial resolution of 0.4 mm. By integration over selected spectral intervals, the mole fractions of all species and subsequently the local gas temperatures have been obtained. A comparison of the temperatures that were found with results from filtered Rayleigh experiments showed good agreement, indicating the success of what are to the best of our knowledge the first one-dimensional single-shot Raman measurements in a sooting hydrocarbon flame.

© 1998 Optical Society of America

OCIS Codes
(120.6780) Instrumentation, measurement, and metrology : Temperature
(280.0280) Remote sensing and sensors : Remote sensing and sensors
(280.1740) Remote sensing and sensors : Combustion diagnostics
(280.2470) Remote sensing and sensors : Flames
(300.6450) Spectroscopy : Spectroscopy, Raman

History
Original Manuscript: April 15, 1997
Revised Manuscript: February 5, 1998
Published: July 20, 1998

Citation
Friedrich Rabenstein and Alfred Leipertz, "One-dimensional, time-resolved Raman measurements in a sooting flame made with 355-nm excitation," Appl. Opt. 37, 4937-4943 (1998)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-21-4937

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