한국연소학회:학술대회논문집
- 한국연소학회 2012년도 제45회 KOSCO SYMPOSIUM 초록집
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- Pages.167-170
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- 2012
에지화염의 자기 진동
Self-excitation of Edge Flame
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Park, Jeong
;
- Youn, Sung Hwan (Hokkaido Univ., Div. of Aerospace Engineering) ;
- Chung, Yong Ho ;
- Lee, Won June ;
- Kwon, Oh Boong
- 발행 : 2012.11.30
초록
Self-excitations of edge flame were studied in laminar lifted free- and coflow-jet as well as counterflow flames diluted with nitrogen and helium. The self-excitations, originated from variation of edge flame speed and found in the above-mentioned configurations, are discussed. A newly found self-excitation and flame blowout, caused by the conductive heat loss from premixed wings to trailing diffusion flame are described and characterized in laminar lifted jet flames. Some trials to distinguish Lewis-number-induced self-excitation from buoyancy-driven one with O(1.0 Hz) are introduced, and then the differences are discussed. In counterflow configuration, important role of the outermost edge flame in flame extinction is also suggested and discussed.