층류 동축류 제트 부상화염에서 소화한계 근처에서의 화염 거동

Characteristics of laminar lifted flames in coflow-jet of propane with helium-diluted coflowing air have been studied experimentally and numerically. Two distinct self-excitations existed: a buoyancy-driven self-excitation and a self-excitation with capsized flame near flame extinction. In particula...

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Published in한국연소학회지 Vol. 24; no. 1; pp. 1 - 6
Main Authors 오수현(Suhyeon Oh), 반규호(Kyuho Van), 박정(Jeong Park), 권오붕(Ohboong Kwon), 김세원(Sewon Kim), 정석호(Sukho Chung)
Format Journal Article
LanguageKorean
Published 한국연소학회 01.03.2019
Subjects
기계공학
Negative buoyancy
Density
Capsized flame
Stoichiometric line
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Summary:Characteristics of laminar lifted flames in coflow-jet of propane with helium-diluted coflowing air have been studied experimentally and numerically. Two distinct self-excitations existed: a buoyancy-driven self-excitation and a self-excitation with capsized flame near flame extinction. In particular, the flame dynamics for the latter flame were related to buoyancy effects caused by the difference in the densities between the fuel and coflow streams. To identify the mechanism of capsized flame, Mie-scattering technique, OH radical and numerical simulation of cold and reacting flow were performed. KCI Citation Count: 0
Bibliography:https://www.jkosco.org/articles/article/kjVX/
ISSN:1226-0959
2466-2089
DOI:10.15231/jksc.2019.24.1.001