Experimental Spectroscopic Studies of Carbon Monoxide (CO) Fluorescence at High Temperatures and Pressures

Abstract : Two-photon excitation laser-induced fluorescence of carbon monoxide (CO-LIF) is investigated experimentally in order to determine the applicability of this technique for imaging CO concentration in aeronautical combustors. Experiments are carried out in a high temperature, high-pressure test cell, and in a laminar premixed CH4/air flame. Influence of temperature and pressure on CO-LIF spectra intensity and shape is reported. The experimental results show that as pressure increases, the CO-LIF excitation spectrum becomes asymmetric. Additionally, the spectrum strongly shifts to the red with a quadratic dependence of the collisional shift upon pressure, which is different from the classical behavior where the collisional shift is proportional to pressure. Moreover, pressure line broadening cannot be reproduced by a Lorenztian profile in the temperature range investigated here (300–1750 K) and, therefore, an alternative line shape is suggested.
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Applied Spectroscopy, Society for Applied Spectroscopy, 2017, 71 (10), pp.2353-2366 〈10.1177/0003702817709439〉
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https://hal.sorbonne-universite.fr/hal-01558553
Contributeur : Guillaume Legros <>
Soumis le : samedi 8 juillet 2017 - 09:45:18
Dernière modification le : mercredi 28 mars 2018 - 14:18:18

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Olivier Carrivain, Mikael Orain, Nelly Dorval, Céline Morin, Guillaume Legros. Experimental Spectroscopic Studies of Carbon Monoxide (CO) Fluorescence at High Temperatures and Pressures . Applied Spectroscopy, Society for Applied Spectroscopy, 2017, 71 (10), pp.2353-2366 〈10.1177/0003702817709439〉. 〈hal-01558553〉

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