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자료유형
학술저널
저자정보
저널정보
한국마린엔지니어링학회 Journal of Advanced Marine Engineering and Technology (JAMET) 한국마린엔지니어링학회지 제30권 제5호
발행연도
2006.7
수록면
572 - 579 (8page)

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Accurate heat release analysis based on the cylinder pressure trace is important for evaluating combustion process of diesel engines. However, traditional single-zone heat release models ( SZM) have significant limitations due mainly to their simplified assumptions of uniform charge and homogeneity while neglecting local temperature distribution inside cylinder during combustion process. In this study, a heat release analysis based on single-zone model has been evaluated by comparison with computational simulation result using Fire-code, which is based on multidimensional model ( MDM). The limitations of the single-zone assumption have been estimated. To overcome these limitations, an improved model that includes the effects of spatial non-uniformity has been applied. From this improved single-zone heat release model ( Improved-SZM), two effective values of specific heat ratios, denoted by ?<SUB>V</SUB>and ?<SUB>H</SUB> in this study, have been introduced. These values are formulated as the function of charge temperature changing rate and overall equivalence ratio. Also, it is applied that each equation of ?<SUB>V</SUB>and ?<SUB>H</SUB> has respectively different slopes according to several meaningful periods during combustion progress. The heat release analysis results based on improved single-zone model gives a good agreement with FIRE-code results over the whole range of operating conditions of target engine, Hyundai HiMSEN H21/32.

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Abstract
1. 서론
2. 다차원 모델 연소해석
3. 단일 영역 모델
4. 상당 비열비 함수
5. 결론
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