NUMERICAL SIMULATION OF UNSTEADY CAVITATING FLOWS: SOME APPLICATIONS AND OPEN PROBLEMS

The Turbomachinery and Cavitation team of LEGI (Grenoble) develops numerical models to take into account the steady state and unsteady effects of cavitating flows. That work is performed in collaboration with the French Space Agency CNES and the Rocket Engine Division of SNECMA-Moteurs, to predict the cavitation behaviour of turbomachinery. The final aim is to p rovide a ssistance to the design and p revision of operating range of rocket engine turbopumps, In this presentation we summarize different t ypes of problems encountered, and illustrate possible applications of the numerical models. This part is widely based on previous papers. We give also an overview of some open problems concerning unsteady cavitation modelling, such as the coupling between a cavitating section and the inlet and outlet pipes or the comparison and validation of different models.

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