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Advanced One-zone Heat Release Analysis for IDI Diesel Engine  

Kim Gyu-Bo (부산대학교 대학원 기계공학과)
Jeon Choung-Hwan (부산대학교 기계공학부, 기계기술연구소)
Chang Young-Jun (부산대학교 기계공학부, 기계기술연구소)
Lee Suk-Young (부산대학교 대학원 기계공학과)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.28, no.7, 2004 , pp. 1101-1110 More about this Journal
Abstract
An one-zone heat release analysis was applied to a 4 cylinder indirect injection diesel engine. The objective of the study is to calculate heat release accurately considering the effect of specific heat ratio. heat transfer and crevice model and to find out combustion characteristics of an indirect diesel engine considering the effect of the pressures in main and swirl chambers. Especially specific heat ratio indicating combustion characteristics is adapted. instead of that indicating matter properties, which has been used in former studies Moreover by adaption of blowby model, cylinder gas mass became accurately calculated. Therefore, with ideal gas equation, calculating cylinder gas temperature, it was found to affect heat transfer loss and heat release. Determining heat transfer constants $C_1$. $C_2$ as 0.6 respectively. the integrated gross heat release values were predicted well for the measured value at various engine speed, full load operating conditions. The curve of heat release rate was similar to SI engine rather than DI engine. That is originated from that swirl chamber reduce an instant combustion which occurs in DI engine due to ignition delay on early stage of combustion.
Keywords
One-zone heat release; Indirect injection diesel engine; Specific heat ratio; Crevice model;
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