A Numerical Prediction Method for the Auto-Ignition Process in a Homogeneous Charge Compression Ignition Engine

An auto-ignition process in a homogeneous charge compression ignition engine has been numerically solved by the Very Large Eddy Simulation (VLES) which integrates a reduced kinetic model for the low temperature oxidation of hydrocarbon fuels. We employ a new method to set the initial turbulent velocity field, reforming the velocity field so that the turbulence dissipation process may fit the results of the K-ε model simulation. The phase-averaged quantities of the VLES agree well with those of the K-ε model simulation. The VLES exhibits the spatially random appearance of auto-ignition sites, which is similar to experimental observations shown in the reference literature.