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2019 Vol.24, Issue 1

Research Article

Flame Behaviors Near Extinction Limit in Laminar Lifted Coflow-Jet Flames

층류 동축류 제트 부상화염에서 소화한계 근처에서의 화염 거동

Suhyeon Oh1
,
Kyuho Van1
,
Jeong Park1*
,
Ohboong Kwon1
,
Sewon Kim2
,
Sukho Chung3
오 수현1
,
반 규호1
,
박 정1*
,
권 오붕1
,
김 세원2
,
정 석호3
1Department of Mechanical Engineering, Pukyong Nat’l University
2Environment & Energy Research Division, Korea Institute of Industrial Technology
3Clean Combustion Research Center, King Abdullah University of Science and Technology
1부경대학교 기계공학과
2한국생산기술연구원 고온에너지시스템그룹
3KAUST Clean Combustion Research Center
* Corresponding Author
30 March 2019. pp. 1-6
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Abstract

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.

Keywords
Negative buoyancy
Capsized flame
Stoichiometric line
Density
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Information
  • Publisher :The Korean Society Combustion
  • Publisher(Ko) :한국연소학회
  • Journal Title :Journal of The Korean Society Combustion
  • Journal Title(Ko) :한국연소학회지
  • Volume : 24
  • No :1
  • Pages :1-6
  • Received Date : 2018-04-04
  • Revised Date : 2018-05-28
  • Accepted Date : 2018-08-22
  • DOI :https://doi.org/10.15231/jksc.2019.24.1.001
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