Abstract
This paper describes with 3-dimentional Computational Fluid Dynamics study to predict ignition and combustion process of a passenger diesel engine under various O_2 concentration conditions. The 3-D CFD code used is KIVA-3V modified on a droplets collision model and velocity interpolation with PaSR turbulence-chemistry interaction model. Diesel oil surrogate mechanism in which oxidation of hydrocarbons, soot and NO_x formations were described was also used for Chemical reaction. As a result, predicted in-cylinder pressure and RHR histories have good agreement with measured ones. It can be predicted qualitative trends of measurement data of NO_x under wide range of O_2 concentration conditions.
