Journal of the Combustion Society of Japan
Online ISSN : 2424-1687
Print ISSN : 1347-1864
ISSN-L : 1347-1864
SERIAL LECTURE—Fundamentals and Applications of Combustion Measurement Technique I
Application of the Chemiluminescence Spectroscopy to Explore the Flame Temperature
Hideki HASHIMOTOJunichi FURUKAWA
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2019 Volume 61 Issue 195 Pages 51-58

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Abstract

To examine temperature of the flamelet of turbulent premixed flames, chemiluminescence intensities of OH, CH and C2 radicals obtained from unstrained methane-air and propane-air premixed flames have been examined using the newly developed chemiluminescence spectroscopy system. It has been shown that the chemiluminescence intensity ratio of 515nm/470nm bands of C2 obtained both from methane-air and propane-air unstrained flames uniquely depends on the temperature of unstrained methane-air and propane-air flames. To establish a novel technique which enables to estimates the temperature of the near-extinction flamelet of turbulent premixed flames, the relation between the temperature and the chemiluminescence intensity ratio of 515.5nm/470.5nm bands of C2 radical of strained flames has been sought by using a counter-flow burner. The unique relation between the flame temperature and the chemiluminescence intensity ratio of 515.5nm/470.5nm bands of C2 radical has been found to exist for the propane-air strained flame. Therefore, it can be concluded that the temperature of flamelets of the propane-air turbulent premixed flame can be estimated by using the relation between the temperature of the strained flame and the chemiluminescence intensity ratio of 515.5nm/470.5nm bands of C2 radical obtained in the present study.

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© 2019 Combustion Society of Japan
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