Scale Resolving Flow Simulations of a Francis Turbine Using Highly Parallel CFD Simulations

  • Timo KrappelEmail author
  • Stefan Riedelbauch
Conference paper


In this paper, transient flow simulations of a Francis turbine in part load conditions are presented. The dominating flow phenomenon, the vortex rope, leads to a very complex flow field, especially in the draft tube of the turbine. As the resolution of turbulence is important, the Scale Adaptive Simulation (SAS) approach is used. The mesh size of the entire Francis turbine is up to 300 million mesh nodes. The commercial CFD code Ansys CFX version 17.0 is used, which performs up to a few thousands of cores for this kind of application.


Draft Tube Convection Scheme Hydraulic Loss Turbulent Eddy Viscosity Runner Blade 
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The authors gratefully acknowledge the High Performance Computing Center Stuttgart (HLRS) for providing computational resources. The research leading to the results presented in this paper is part of a common research project of the Institute of Fluid Mechanics and Hydraulic Machinery, University of Stuttgart, Voith Hydro Holding GmbH & Co. KG and Ansys Germany GmbH.


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Copyright information

© Springer International Publishing AG 2016

Authors and Affiliations

  1. 1.Institute of Fluid Mechanics and Hydraulic MachineryStuttgartGermany

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