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
- 399 - 404 (6page)
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이 논문의 연구 히스토리 (5)
2015
2014
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초록· 키워드
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Ignition phenomena plays an important role in spark ignition engine. It can be described in three different phase - breakdown, arc and glow discharge and each process is governed by very complicated physics. In direct injection spark ignition engine, due to the direct fuel injection, the air-fuel mixture is highly stratified in combustion chamber and it affect on the spark ignition process.
In this study, the ignition phenomena of direct injection spark ignition engine was modeled with consideration on the detailed physics. The spark channel across the spark plug is described by lagrangian passive particles and it is stretched and advected by the mean flow field. Ignition is determined by a local Karlovitz-number criterion that incorporates effects of turbulence and chemical reaction. From the ignitable region, the flame kernel is initiated and developed in laminar flame speed. Turbulence fluctuation and gradient of mixture distribution which affect the spark channel wrinkling and laminar burning rate are analyzed by sub-grid scale of mixture fraction and velocity. In order to investigate the fundamentals of ignition is whether well resolved in the moeling, a static box mesh was used to simulate the ignition process. It is revealed that the spark channel stretching and elongation, local ignition and flame kernel growth are resolved well.
In this study, the ignition phenomena of direct injection spark ignition engine was modeled with consideration on the detailed physics. The spark channel across the spark plug is described by lagrangian passive particles and it is stretched and advected by the mean flow field. Ignition is determined by a local Karlovitz-number criterion that incorporates effects of turbulence and chemical reaction. From the ignitable region, the flame kernel is initiated and developed in laminar flame speed. Turbulence fluctuation and gradient of mixture distribution which affect the spark channel wrinkling and laminar burning rate are analyzed by sub-grid scale of mixture fraction and velocity. In order to investigate the fundamentals of ignition is whether well resolved in the moeling, a static box mesh was used to simulate the ignition process. It is revealed that the spark channel stretching and elongation, local ignition and flame kernel growth are resolved well.
목차
ABSTRACT
1. 서론
2. 해석 모델
3. 해석 결과
4. 결론
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UCI(KEPA) : I410-ECN-0101-2013-431-003254951