Etude synthétique du problème de la modélisation des écoulements partiellement cavitants

Overview of the partially cavitating flows modelling problem

Ingénieur de recherches au CNRS

Abstract

After a brief historical review, some of the difficulties directly linked to the problems of modelizing partially cavitating flows are analysed. Afterwards, an outline is given concerning the critical study of some of the models currently available in current literature, followed by the presentation of a model which was drawn up at the CREMHyG four years ago. The ability of the model to adapt to various ways of calculating (singular points or finite elements) and to account for the extremely various operational conditions is demonstrated via several models: such as the case of a single profile placed in a canal; an identical example with significant confinement effects and viscous effects; examples of two cavities being formed around an asymmetrical body whilst accounting for a gravitation effect: collar of centrifugal pump.