Investigating nozzle’s orifice flow is challenging both experimentally and theoretically.
This paper focuses on simulating flow inside diesel injector nozzle via Ansys fluent
v15. Validation is performed with experimental results from Winkhofler et al (2001).
Several important parameters such as mass flow rate, velocity profiles and pressure
profiles are used for this validation. Results include the effects of contraction
inside nozzle’s orifice, effect of compressibility; effect of injection pressures
and several orifice entries are also simulated in this study. For considering the
effect of compressibility a user defined function used in this simulation. Cavitation
model which is used in this simulation is Singhal et al. cavitation model. Presto
discretization method is used for Pressure equation and second upwind discretization
method is used for Momentum equation. Converging Singhal et al. cavitation model is
very challenging and it needs several efforts and simulations.