Mechanism analyses of the unsteady vortical cavitation behaviors for a waterjet pump in a non-uniform inflow

The waterjet pump is widely applied in the high-speed marine vessels to exploit various kinds of resources vast ocean. transient cavitating flows a are numerically investigated under non-uniform inflow for purpose revealing correlation mechanism between cavitation and vorticity diffusion as well exited pressure fluctuations. unsteady numerical simulation conducted by using Reynold-Averaged Navier-Stokes (RANS) method coupled with homogenous model. Both hydrodynamic performance predicted present approach when compared available experimental data. occurrence would cause larger pulsations characteristics nonuniformity together perpendicularity at impeller inlet plane. As blade passes through inflow, instantaneous dynamics behaviors include cavity generation, development extinction, dominant frequency corresponds rotating frequency. Based on analyses boundary flux, an important from into mainstream major contributor variable density due cavitation. Furthermore, combined computational theoretical analysis illustrates that volume variations flow-rate fluctuations acceleration source inside mixed-flow pump.