Ecoulement instationnaire dans un diffuseur aubé d'une pompe centrifuge

This paper describes experimental and computational work to examine the unsteady flow field in the vaned diffuser ~fa medium specifie speed pump. The aim ofthis project is to verify a commerr:ialy avOilable Navier-Stokes program with a k-E turbulence model and to improve our understanding ofthe complex unsteady three-dimensional flow field { m ssociated with the interaction between a pump impeller and its vaned diffuser.