Abstract: The multi-dimensional two-phase mathematical model of cavitating nozzle flow is developed for the developed cavitating flow. Thus the three-dimensional numerical simula- tion of cavitating flow in nozzle holes of a vertical multi-hole injector is dealt with . The hole exit boundary of the computational area is extended to outside the nozzle holes for the first time to decrease the effect of the nozzle holes exit on the inside of computational area. At the same time the cavita- ting flow in the various nozzle holes under needle eccentricity is analyzed and studied in detail. Thus it is pointed out clearly that the cavitating flow in nozzle holes and the effect of the cavitating flow on the flow of the nozzle holes exit and on the fuel spray atomization

Key words: Cavitating flow, Multi-hole nozzle, Needle eccentricity, Nozzle holes, Three-dimensional numerical simulation