Numerical simulation of two-dimensional combustion process in a spark ignition engine. Assessment of constants in submodels.

Abstract

To examine the values of constants in submodels such as the k-ε turbulence model, flame kernel ignition model, irreversible reaction model and heat loss model, the two-dimensional combustion process in a spark ignition engine with or without a prechamber is calculated numerically, while changing the constant values in these submodels. Consequently, the reasonable constants in the submodels can be determined by comparing the calculated values of ignition delay, mean velocity, gas pressure and gas temperature with the measured ones.