Calcul potentiel instationnaire appliqué à l'interaction roue-volute des pompes centrifuges

Interaction impeller-volute in centrifugal pumps : computing potential unsteady phenomena

LEMFI, ESA, CNRS 7067, ENSAM

Abstract

An algorithm generalizing the singularity method was developed. It allows to take into account the interaction between fixed and mobile cascades. Its principle is based on the summation of discrete vortices distributed periodically on the rotor and stator profiles. The overall matrix, obtained by applying the boundary conditions, takes into account the complexity of the studied machine geometry (presence or not of splitter blades possibly variable pitch of the profiles, etc.) To validate the model and to illustrate the influence of the potential phenomena on the fluctuations in pressure generated by the rotor-stator interaction, we present a theoretical and experimental study undertaken on a centrifugal pump.