Development of Turbulent Combustion Model with Combustion Zone for 2 Zone Combustion Calculation Code for Gasoline Engines

Abstract

Conventional calculation methods with a 2 zone combustion model for gasoline engines needed a heat release pattern obtained by experiments. The way of calculation for obtaining turbulence intensity in a cylinder using intake velocity was proposed, and the turbulent combustion speed came to be estimated using the turbulence intensity. But any reliable calculation method has not been established. A calculation model considering a vortex scale in the combustion zone is proposed, and it is confirmed that the accuracy of the model is better than conventional ones. The calculation model and its advantages are described in this paper.