Numerical Simulation and Analysis on Cavitation Flow in a Nozzle

In this paper,using multiphase cavitation flow model,3D numerical simulation was done to the fully developed cavitation flow in a nozzle at steady spray.The formation mechanism and distribution of cavitation inside the nozzle were analyzed using multiphase flow model coupled with cavitation model.Based on this model,the effects of injection pressure,back pressure,inlet round angle-radius ratio and k-factor of nozzle,on the distribution of the cavitation inside the nozzle are analyzed.Simulation results show that less cavitations intensity can be realized by decreasing the injection pressure,enhancing back pressure or enhancing the nozzle inlet round angle-radius ratio and k-factor.