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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국자동차공학회 International journal of automotive technology International journal of automotive technology Vol.4 No.3
- 발행연도
- 2003.9
- 수록면
- 125 - 133 (9page)
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초록· 키워드
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Several models for the evaluation of Gross Heat Release from the internel combustion engine (ICE) are
often used in literature. One of these is the First Law - Single Zone model (FL-SZM), derived from the First Law of Thermodynamics. This model presents a twice advantage: first it describes with accuracy the physic of the phenomenon (charge heat release during the combustion stroke and heat exchange between gas and cylinder wall); second it has a great simplicity in the mathematical formulation. The evaluation of Heat Release with the FL-SZM is based on pressure experimental measurements inside the cylinder. and on the assumption of several parameters as the specific heat ratio. wall temperature. polytropic exponent for the motored cycle evaluation. and many others. In this paper the influence of gases thermodynamic properties on Gross Heat Release has been esteemed. In particular the influence of an appropriate equation for k= k(T) (specific heat ratio vs. temperature) which descrihes the variations of gases thermodynamic properties with the mean temperature inside the cylinder has heen evaluated. This equation has been calculated by new V order Logarithmic Polynomials (VoLP). fitting experimental gases properties through the least square methods.
often used in literature. One of these is the First Law - Single Zone model (FL-SZM), derived from the First Law of Thermodynamics. This model presents a twice advantage: first it describes with accuracy the physic of the phenomenon (charge heat release during the combustion stroke and heat exchange between gas and cylinder wall); second it has a great simplicity in the mathematical formulation. The evaluation of Heat Release with the FL-SZM is based on pressure experimental measurements inside the cylinder. and on the assumption of several parameters as the specific heat ratio. wall temperature. polytropic exponent for the motored cycle evaluation. and many others. In this paper the influence of gases thermodynamic properties on Gross Heat Release has been esteemed. In particular the influence of an appropriate equation for k= k(T) (specific heat ratio vs. temperature) which descrihes the variations of gases thermodynamic properties with the mean temperature inside the cylinder has heen evaluated. This equation has been calculated by new V order Logarithmic Polynomials (VoLP). fitting experimental gases properties through the least square methods.
목차
ABSTRACT
1.INTRODUCTION
2.FIRST LAW WITH VARIABLE SPECIFIC HEATS RATIO AND HEAT TRANSFER
3.CONCLUSIONS
REFERENCES
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