The simulations have been performed for about 100 cases with different mesh qualities, boundary conditions, geometry, inlet pressure, and turbulence model. Study on variety of inlet pressure allowed to analysis of the cavitation inception and development inside the injector and mass flow choking induced by cavitation inside the nozzle hole. In following, a brief explanation of the equations will present. After introducing the geometry and simulations conditions, results will present. Compromising the result with experimental studies will present later.