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Flow Simulation of a Francis Turbine Using the SAS Turbulence Model

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High Performance Computing in Science and Engineering ‘13

Abstract

The operation of Francis turbines in part load conditions causes high fluctuations and dynamic loads in the turbine and the efficiency of the draft tube decreases strongly. For a better understanding of the various instantaneous phenomena, flow simulations of the complete Francis turbine are done with particular focus on the draft tube flow.The SAS (Scale Adaptive Simulation) model is used as turbulence model. Depending on the grid resolution and the time step size, this model allows the resolution of smaller turbulent structures compared to RANS turbulence models.Flow phenomena in a Francis turbine require long physical time to convect through the machine. Therefore, long computational time with many processors is necessary to conduct such a flow simulation.

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Author information

Authors and Affiliations

  1. Institute of Fluid Mechanics and Hydraulic Machinery, Pfaffenwaldring 10, 70550, Stuttgart, Germany

    Timo Krappel, Albert Ruprecht & Stefan Riedelbauch

Authors
  1. Timo Krappel
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  2. Albert Ruprecht
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  3. Stefan Riedelbauch
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Corresponding author

Correspondence to Timo Krappel .

Editor information

Editors and Affiliations

  1. Zentrum für Informationsdienste und Hochleistungsrechnen (ZIH), Technische Universität Dresden, Dresden, Germany

    Wolfgang E. Nagel

  2. Abteilung für Angewandte Mathematik, Universität Freiburg, Freiburg, Germany

    Dietmar H. Kröner

  3. Höchstleistungsrechenzentrum Stuttgart (HLRS), Universität Stuttgart, Stuttgart, Germany

    Michael M. Resch

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© 2013 Springer International Publishing Switzerland

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Krappel, T., Ruprecht, A., Riedelbauch, S. (2013). Flow Simulation of a Francis Turbine Using the SAS Turbulence Model. In: Nagel, W., Kröner, D., Resch, M. (eds) High Performance Computing in Science and Engineering ‘13. Springer, Cham. https://doi.org/10.1007/978-3-319-02165-2_31

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