Abstract

A highly collimated laser beam is used to observe molecular absorption in a premixed air-acetylene flame by providing a two-dimensional image on a vidicon camera. Spatially resolved molecular concentrations can thus be obtained in 1/60 second. By measurement of the relative intensities of absorption from different vibrational levels in the ground state of the molecules, a vibrational temperature can be derived for each of the spatial regions in the flame. This information is directly relevant to the understanding of dissociation in flames.

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J. E. M. Goldsmith
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Spatially resolved multispecies and temperature analysis in hydrogen flames

Wolfgang Reckers, Lutz Hüwel, Gerd Grünefeld, and Peter Andresen
Appl. Opt. 32(6) 907-918 (1993)

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Xunchen Liu, Guoqing Wang, Jianyi Zheng, Liangliang Xu, Sirui Wang, Lei Li, and Fei Qi
Opt. Express 26(24) 31983-31994 (2018)

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