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
- 2013.12
- 수록면
- 51 - 54 (4page)
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Stabilization and extinction characteristics of premixed flames in a radial multi-channel were investigated experimentally and theoretically. In the authors" previous study, a radial multi-channel burner, made of transparent quartz plates, was fabricated and various flame behaviors like stable flame, pulsating instability, sudden extinction, blowout and unstable extinction were mapped on the parameter plane of mixture equivalence ratio and flow rate. In subsequent experiments, another sudden extinction phenomenon of the stable flame was found when reducing the mixture flow rate, which was not covered in the previous study. In order to clarify the mechanism of such extinction, theoretical analysis is conducted. A single divergent channel, constituting the radial multi-channel, is approximated as a quasi-one-dimensional channel with varying mixture velocity as a function of flame position. One-dimensional gas and solid phases energy equations and conservation equation of a deficient species are solved with the large activation energy asymptotics. As a result, leading-order analysis gives S-shaped multiple solutions, which are one stable, one unstable and a physically meaningless branches, and the sudden extinction with reducing the mixture flow rate is theoretically and qualitatively captured by the existence of a critical point transiting from the stable to the unstable branch.
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UCI(KEPA) : I410-ECN-0101-2015-430-001129158