Abstract
The effect of injector position on the performance of a homogeneous gasoline direct injection (GDI) engine is studied by 3-dimensional multiphase simulation. The Reitz-Diwakar droplet break-up model and the 3 Zones Extended Coherent Flame Model (ECFM3Z) combustion model are adopted. Two different positions of injector are investigated. By comparing the velocity field, droplet distribution, atomization percent and the pressure, it was found that the position of the nozzles has great influence on the performance of the engine. Optimizing the position will increase the atomization and generate uniform mixed gas, which leads to better combustion.
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