Planar Laser-Induced Fluorescence Research on Flame Quenching and OH Radical Behavior Near the Walls
Publication: Journal of Energy Engineering
Volume 143, Issue 5
Abstract
This paper details a quantitative joint Reynolds number, equivalence ratio, wall material, and quenching distance imaging experiment designed to investigate OH radical behavior near the walls in premixed methane–air combustion. Different wall materials, such as AZ31B, 316STS, and AlN, are studied. The greater the Reynolds number, the lower the maximum fluorescence intensity of the flame. When the distance between walls is 7 mm, two areas of high counts could be found, located on both sides of the bottom; the middle area has no OH radical signal at all. This is the repetitive extinction/reignition phenomenon of radicals. The order of the maximum fluorescence intensity in the flame between the six materials is . The order of the quenching distance of OH radicals is . For the same material, the greater the maximum fluorescence intensity, the smaller the quenching distance.
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Acknowledgments
This research is supported by the Fundamental Research Funds for the Central Universities with Project No. 106112016CDJZR145507 and National Natural Science Foundation of China (Project No. 51206200).
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Published In
Journal of Energy Engineering
Volume 143 • Issue 5 • October 2017
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©2017 American Society of Civil Engineers.
History
Received: Nov 4, 2016
Accepted: Jan 5, 2017
Published online: Apr 25, 2017
Discussion open until: Sep 25, 2017
Published in print: Oct 1, 2017
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