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HYBRID RANS/LES SIMULATIONS OF A CAVITATING FLOW IN VENTURI

Jean Decaix
Department of Systems Engineering University of Applied Science Western Switzerland Route du Rawyl 47 / CH-1950 Sion / Switzerland

Eric Goncalves
ISAE-ENSMA, Institut Pprime, UPR 3346 CNRS, Poitiers, France

要約

A numerical investigation of the behaviour of a cavitation sheet developing along a Venturi geometry has been performed using a compressible one-fluid RANS solver. The interplay between turbulence and cavitation regarding the unsteadiness and the structure of the flow is complex and not well understood. This constitutes a determinant point to accurately simulate the dynamic of sheet cavities. Various turbulent approaches are tested: a new Scale-Adaptive model (SAS) and the Detached Eddy Simulation (DES). 3D simulations are compared with the experimental data. An oblique mode of the sheet is put in evidence.