Numerical simulation of the combustion process in spark–ignition engines

Abstract

The combustion process in spark–ignition engines is simulated using a multi–dimensional simulation method similar to that of Ahmadi–Befrui et al. The turbulence characteristics are described by the k–e model that is modified by taking into consideration the results of in–cylinder measurements. An empirical constant for the combustion submodel is determined by optimum matching of the predicted cylinder–pressure courses with the measured ones. Calculations reasonably reproduce the measured course of combustion. Furthermore, a discussion is given on the effects of induction swirl and fuel–air equivalence ratio on combustion process.