Abstract
In the present study, the effect of butanol blend fuel on soot reduction was investigated in a diesel engine theoretically as well as experimentally. The concept of the threshold sooting index (TSI), which has been proposed as the sooting tendency in fuel flames, was incorporated into the soot formation model in KIVA-3V code. The soot emission trend obtained in the experiments was clearly shown in the present simulation by considering the characteristic TSI values for butanol and gas oil as well as the alcohol blend ratio.