Abstract
The application of Kiva-3v Release 2 to studies of soot formation and destruction processes in a direct injection diesel engine has been investigated. Model validation has been based on comparisons with data from concurrent experimental studies for pressure traces and engine-out emissions. Simulations have been carried out to explore how swirl ratio, boost pressure, EGR rate, rail pressure and fuel injection timing influence the spatial and temporal development of in-cylinder soot mass. Results are presented for an engine speed and IMEP of 3000 rev/min and 13 bar, respectively. The investigation shows that swirl ratio and injection timing affect both the concentration and spatial distribution of soot, whereas boost pressure, EGR and rail pressure act predominantly on soot concentration.
Keywords:Kiva CFD, Diesel, Soot, Swirl, EGR