Three-dimensional Numerical Simulation of Knocking Phenomenon in a LPG-DME Spark Ignition Engine on the Basis of a Chemical Kinetic Model

摘要

In order to promote utilization of DME, the authors had made research on the potential of combustion in a spark ignition engine with the mixed fuel of LPG (main component: Propane) and DME (Dimethyl Ether). Deterioration of knocking limit was observed in experiment when the fraction of DME in the mixed fuel was increased, whereas the combustion process had not been made clear well. Therefore, the authors conducted three-dimensional numerical simulation of the combustion process in the LPG-DME spark ignition engine on the basis of a chemical kinetic model, and elucidated the knocking phenomenon.