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
- 65 - 69 (5page)
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초록· 키워드
오류제보하기
Two-dimensional direct numerical simulations (DNSs) of the ignition of lean primary reference fuel (PRF)/air mixtures at high pressure and intermediate temperature near negative temperature coefficient (NTC) regime were performed to elucidate the effects of fuel composition, thermal stratification, and turbulence on PRF homogeneous charge compression-ignition (HCCI) combustion. In general, it was found that the mean heat release rate increases slowly and the overall combustion occurs fast with increasing thermal stratification regardless of the fuel composition. In addition, the effect of the fuel composition on the ignition characteristics of PRF/air mixtures was found to be significantly reduced with increasing thermal stratification. The reduction of the fuel effect under the high degree of thermal stratification is caused by the nearly identical propagation characteristics of deflagrations of different PRF/air mixtures. Ignition Damkohler number is proposed to quantify the successful development of deflagrations from nascent ignition kernels. It was verified that for cases with large ignition Damkohler number, turbulence with high intensity and short-timescale can advance the overall combustion by increasing turbulent flame area instead of homogenizing initial mixture inhomogeneities.
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UCI(KEPA) : I410-ECN-0101-2015-430-001129198