Abstract
The flow inside Diesel injectors is important because of its effect on the spray and the atomization process in the combustion chamber. Due to huge stress at the orifice entrance, cavitation occurs in high-pressure Diesel injectors. In this study, we investigate numerically the cavitating steady flow in a Diesel injector. The mixture model based on a single fluid and the standard k-epsilon turbulence model are used to simulate the multiphase turbulent flow. The effects of some geometrical parameters on both the discharge coefficient and the vapor fraction are presented.