抄録
This paper describes a numerical simulation of screw-type centrifugal pump with tip clearance. A reliable commercial three-dimensional Navier-Stokes code with a standard k-ε turbulence model was used for this study. The influence of tip clearance is remarkable in this pump type. In the present study, to catch up the interaction effect between the impeller and volute casing, we have calculated the flow fields in a volute casing as well as in an impeller simultaneously by exchanging the calculated data between them at every time step. The simulation results show that the calculation considering the effect of the tip clearance can be predicted reasonably well. The measured pressure distributions are also compared.
