Analyse du couplage pompe - circuit à partir d'un modèle Navier - Stokes instationnaire de l'écoulement dans la pompe

Coupling pump - circuit analysis using a Navier Stokes unsteady model for the flow in the pump

¹ Institut National Polytechnique de Grenoble, Laboratoire des Ecoulements Géophysiques et Industriels de Grenoble
² Université Technologique et de Génie Civil de Bucarest

Abstract

This article presents a numerical analysis of the coupling pump-circuit. This study takes into account simultaneously the interactions between mobile and fixed parts of a centrifugal pump, as well as the interactions between this same pump and the surrounding circuit. The first results show the necessity to take into account the circuit influence to quantify the field of pressure in the pump. In addition, the pump is a source of flow rate and pressure fluctuations in the circuit: these fluctuations depend strongly on the location of blades with respect to the volute tongue: the flow rate and the head are minimum when a blade is placed just opposite to the volute tongue. Moreover, fluctuations intensities depend on the location of pump in the circuit.