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Chimera Simulations of Transported Large–Scale Vortices and Their Interaction with Airfoils

  • Christoph Wolf
  • Axel Raichle
  • Tobias Knopp
  • Dieter Schwamborn
Part of the Notes on Numerical Fluid Mechanics and Multidisciplinary Design book series (NNFM, volume 112)

Summary

A Chimera technique for moving grids is applied to simulate the transport of large-scale vortices convected by a mean velocity field over large distances and their interaction with an airfoil. While keeping the numerical dissipation at a minimum, the Chimera approach allows to resolve the vortex on a local fine grid whereas the unstructured global background grid can be relatively coarse. Having examined the vortex dissipation rate numerically, the interaction of a Rankine-like type vortex with a NACA 0012 airfoil and an ONERA-A airfoil near stall, respectively, is simulated. The interaction can be interpreted as a time-dependent variation in the effective angle of attack. A subsequent computation of a flapping NACA 0012 airfoil turns out to be an insufficient approximation of the vortex-airfoil interaction.

Keywords

Wake Vortex Numerical Dissipation Vortex Interaction Grid Cell Size Effective Angle 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Christoph Wolf
    • 1
  • Axel Raichle
    • 2
  • Tobias Knopp
    • 1
  • Dieter Schwamborn
    • 1
  1. 1.DLR Göttingen, AS-C2A2S2EGöttingenGermany
  2. 2.DLR Göttingen, AS-C2A2S2EBraunschweigGermany

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