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Determination of absolute methyl-and hydroxyl-radical concentrations in a low pressure methane-oxygen flame

✍ Scribed by T. Etzkorn; J. Fitzer; S. Muris; J. Wolfrum

Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 315 KB
Volume: 208
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(93)89080-2

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✦ Synopsis

An experimental and theoretical investigation of OH-and CHr-radical profiles in a premixed stoichiometric CH,/02 flat flame burning at a total pressure of 10 Torr has been carried out. Relative OH concentration profiles were determined using laserinduced fluorescence (LIF). Absolute calibration of these relative profiles was performed using absorption spectroscopy giving a mole fraction of about 5% OH in the burnt gas region. Absolute CH, concentrations were obtained from in situ absorption measurements. A maximum CHX mole fraction of 1.2% was determined. The experimental data are in reasonable agreement with the results of flame structure calculations.

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