Picosecond fluorescence lifetime measurement of the OH radical in an atmospheric pressure flame

Direct measurements are reported of the OH (A 2Σ +, ν′ = 0→X 2, ν″ =0) fluorescence lifetime in a laminar, premixed atmospheric methane-air flame, using a picosecond dye laser system based on the distributed feedback principle. Such measurements are needed for the determination of absolute species c...

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Bibliographic Details
Published in:Chemical physics letters 1987-12, Vol.142 (1), p.15-18
Main Authors: Schwarzwald, Ralf, Monkhouse, Penelope, Wolfrum, Jürgen
Format: Article
Language:English
Subjects:
Applied sciences
Combustion. Flame
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Theoretical studies. Data and constants. Metering
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Summary:Direct measurements are reported of the OH (A 2Σ +, ν′ = 0→X 2, ν″ =0) fluorescence lifetime in a laminar, premixed atmospheric methane-air flame, using a picosecond dye laser system based on the distributed feedback principle. Such measurements are needed for the determination of absolute species concentrations by laser-induced fluorescence. An average value for the lifetime of 1.97±0.26 ns is obtained, irrespective of vertical position in the flame and of equivalence ratio in the range φ = 0.77 to 1.43.
ISSN:0009-2614
1873-4448
DOI:10.1016/0009-2614(87)87242-1