Numerical Simulation of Cavitating Flow in Nozzle of DME Engine

Atomization and combustion characteristics of DME diesel engines is considerably affected by nozzle fuel flow injectors. The FLUENT was employed to numerically estimate engine nozzle. influence different inlet pressure, fillet condition on the pressure distribution average jet velocity were studied. results indicate that minimum value transition zone proportional natural logarithm fillet; parabolic in relation zone, zone’s low decreasing trend became more faster with increasing; main factor rate difference outlet radius increasing, firstly increasing then decreasing.