The autoignition and combustion processes of a diesel spray are numerically studied. To simulate the autoignition and the combustion process in a diesel spray, the wave instability breakup model, the Shell ignition model, and the modified eddy breakup...
The autoignition and combustion processes of a diesel spray are numerically studied. To simulate the autoignition and the combustion process in a diesel spray, the wave instability breakup model, the Shell ignition model, and the modified eddy breakup model are implemented in the KIVA-Ⅱ code. The coupling mechanism between fluid mechanics and chemical reaction associated with autoignition is discussed in detail. Numerical results indicate that the mixing process along the edges of spray jet has a crucial role for autoignition and combustion process. We also investigate effects of injection pressure and concentration of O₂ and CO₂ on the autoignition process in the diesel/EGR environment.<br/>