La Houille Blanche
Number 2, Avril 2001
|Page(s)||70 - 74|
|Published online||01 July 2009|
Analyse de l'instabilité de cavitation dans un inducteur par modélisation de l'écoulement instationnaire en grille d'aubes
Analysis of cavitation instabilities in an inducer by modelling unsteady flows in a blade cascade
Laboratoire des Ecoulements Géophysiques et Industriels, LEGI, BP 53, 38041 Grenoble Cedex 9
2 Actuellement: Ecole Nationale d'Ingénieurs de Saint-Etienne. LTDS
Auteur de correspondance : firstname.lastname@example.org
An analysis of cavitation instabilities in rocket-engines inducers is developed by the LEGI in collaboration with the CNES and Snecma-Moteurs DMF. It is based on the modelling of the unsteady cavitating flow in a 2D blade cascade. Computations taking into account the complete coupling between the different blade-to-blade channels are carried out. They lead, according to the operation point, either to a stable and symmetrical behaviour of the cavitation on the different blades, or to a non-symmetrical and unsteady behaviour, showing in the different channels different structures of cavitation, whose distribution is in rotation with respect to the rotor. In these last cases, a super-synchronous instability, which agrees with experimental observations in this type of machine, is obtained in the stator frame.
© Société Hydrotechnique de France, 2001
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