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자료유형
학술대회자료
저자정보
박진욱 (부경대학교) 박정 (부경대학교) 윤진한 (한국 기계연구원) 길상인 (한국 기계연구원)
저널정보
한국연소학회 KOSCO SYMPOSIUM 논문집 2014년도 한국연소학회 제49회 추계학술대회 KOSCO SYMPOSIUM 초록집
발행연도
2014.11
수록면
81 - 84 (4page)

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A Experimental study on flame extinction behavior was investigated using He curtain flow with counter triple co-flow burner. Buoyancy force was suppressed up to a microgravity level of 10-2?10-3g by using He curtain flow. The stability maps were provided with a functional dependency of diluent mole fraction and global strain rate to clarify the differences in flame extinction behavior. 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 such as (I) and (II): an extinction through the shrinkage of the outmost edge flame forward the flame center after self-excitation and without self-excitation, respectively, (III): an extinction through rapid advancement of a flame hole while the outmost edge flame is stationary, (IV): self-excitation occurs in the outermost edge flame and the center edge flame and then a donut shaped flame is formed and/or the flame is entirely extinguished, (V): shrinkage of the outermost edge flame without self-excitation followed by shrinkage or survival of the center flame. 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-0101-2016-431-000986434