Characterization of temperature non-uniformity over a premixed CH sub(4)-air flame based on line-of-sight TDLAS

A novel technique for characterizing temperature non-uniformity has been investigated based on measurements of line-of-sight tunable diode laser absorption spectroscopy. It utilized two fiber-coupled distributed feedback diode lasers at wavelengths around 1339 and 1392 nm as light sources to probe t...

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Veröffentlicht in:Applied physics. B, Lasers and optics Lasers and optics, 2016-01, Vol.122 (1), p.1-9
Hauptverfasser: Zhang, Guangle, Liu, Jianguo, Xu, Zhenyu, He, Yabai, Kan, Ruifeng
Format: Artikel
Sprache:eng
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Zusammenfassung:A novel technique for characterizing temperature non-uniformity has been investigated based on measurements of line-of-sight tunable diode laser absorption spectroscopy. It utilized two fiber-coupled distributed feedback diode lasers at wavelengths around 1339 and 1392 nm as light sources to probe the field at multiple absorptions lines of water vapor and applied a temperature binning strategy combined with Gauss-Seidel iteration method to explore the temperature non-uniformity of the field in one dimension. The technique has been applied to a McKenna burner, which produced a flat premixed laminar CH sub(4)-air flame. The flame and its adjacent area formed an atmospheric field with significant non-uniformity of temperature and water vapor concentration. The effect of the number of temperature bins on column-density and temperature results has also been explored.
ISSN:0946-2171
1432-0649
DOI:10.1007/s00340-015-6289-4