2008 年 43 巻 6 号 p. 971-976
The purpose of this study is to establish a practical method based on a chemical kinetic model for three-dimensional numerical analysis of the combustion process in direct-injection diesel engines. For saving computational time, a reduced elementary reaction scheme for diesel fuel was constructed. The basis was the Golovitchev detailed elementary reaction scheme. Using an original engine combustion simulation code GTT-CHEM along with the reduced elementary reaction scheme, the combustion process was three-dimensionally analyzed in a direct-injection diesel engine with high-EGR ratios.
As a result, the combustion process and NO emission were quantitatively predicted by estimating the initial gas state and the initial composition appropriately. The emission tendency of soot was reasonably assessed by means of φ-T maps.