지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 2011.12
- 수록면
- 359 - 365 (7page)
이용수
이 논문의 연구 히스토리 (3)
2012
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초록· 키워드
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Flame flickering has been occurred mainly due to buoyancy force for pool fires under ambient air. The cup burner flame was used to experimentally investigate the effect of oxidizer velocity on the gravitational instability. The results showed that the flickering frequency was decreased with increasing the oxidizer velocity. The frequency- buoyancy relation with non-dimensional variables was coincide with that of buoyant flume and pool fires when the characteristic velocity was defined to the difference between fuel and oxidizer velocities, which implies that the origin of the gravitational instability is Kelvin-Helmholtz instability in shear layer. The effect of oxidizer composition on the instability was also examined by nitrogen dilution in oxidizer stream. As the concentration of inert gas increased, the length of the blue flame was increased and the lift-off behavior was observed. The oscillation frequency was independent of dilution ratio but related to the local flame structure. Also, various instability modes at flame base, cell, swing and rotating, were produced near the extinction limit.
목차
ABSTRACT
1. 서론
2. 실험장치 및 방법
3. 결과 및 검토
4. 결론
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UCI(KEPA) : I410-ECN-0101-2013-431-003254895