Comportement dynamique des ensembles tournants de turbomachines couplés aux fluides environnants

Dynamic behaviour of turbomachines rotating sets coupled with surrounding fluids

Laboratoire de Mécanique des Structures, UPRESA CNRS 5006, INSA Lyon

Abstract

This paper presents and illustrates the coupling techniques developed at the Laboratoire de Mécanique des Structures, adapted to the analysis of fluid structure coupled behaviours in turbomachines. Three different aspects are considered: the added mass effect, the aeroelastic instability called flutter and the global analysis of flexible wheel-shaft assemblies. These problems are quite different but the coupling techniques used for each case are close. Within this context, the interest of modal techniques is particularly highlighted.