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자료유형
학술대회자료
저자정보
박진욱 (부경대학교) 정용호 (부경대학교) 박정 (부경대학교) 윤진한 (한국기계연구원) 길상인 (한국기계연구원)
저널정보
한국연소학회 KOSCO SYMPOSIUM 논문집 2014년도 한국연소학회 제48회 춘계학술대회 KOSCO SYMPOSIUM 초록집
발행연도
2014.5
수록면
209 - 212 (4page)

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Experimental study on flame extinction behavior was investigated using He curtain flow with counter triple coflow burner. Buoyancy force was suppressed up to a microgravity level of 10-2?10-3g by using He curtain flow. The stability map for clarifying characteristics of the flame extinction behavior could be obtained. The stability map was represented by outer and inner He-diluted mole fraction at various global strain rates. The flame oscillation could be observed near flame extinction at sufficiently low global strain rate. The flame extinction curves had C-shapes at various global strain rates. The oscillation and extinction modes were different each other in terms of the global strain rate, and the flames extinction modes could be classified into five modes: an extinction through the shrinkage of the outmost edge flame forward the flame center after self-excitation (Ⅰ), that without self-excitation (Ⅱ), that with having the inner flame oscillation with a donut shape of the flame hole at the flame center (Ⅲ), that via rapid advancement of the flame hole after the inner flame oscillates (Ⅳ), that through the rapid advancement of the flame hole while outmost edge flame is stationary. The flame extinction modes were observed to be quitely different depending on the global strain rate (6, 10, 14, and 16 s-1). These oscillation and extinction modes could be identified well to the behavior of edge flame. The result also showed that the edge flame was influenced significantly by the conductive heat losses to the flame center or ambient He curtain flow.

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UCI(KEPA) : I410-ECN-0101-2015-430-001632203