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Unsteady RANS Computations of the Flow Past an Airfoil in the Wake of a Rod

[+] Author Affiliations
Jérôme Boudet, Damiano Casalino, Marc C. Jacob, Pascal Ferrand

Ecole Centrale de Lyon, Ecully, France

Paper No. FEDSM2002-31343, pp. 1137-1142; 6 pages
doi:10.1115/FEDSM2002-31343
From:
  • ASME 2002 Joint U.S.-European Fluids Engineering Division Conference
  • Volume 1: Fora, Parts A and B
  • Montreal, Quebec, Canada, July 14–18, 2002
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 0-7918-3615-0 | eISBN: 0-7918-3600-2
  • Copyright © 2002 by ASME

abstract

Two-dimensional Reynolds Averaged Navier-Stokes (RANS) equations are solved in order to simulate the interaction between a Kármán vortex street shed from a rod and a NACA-0012 airfoil in the wake of the rod. Two closure turbulence models are tested, a linear and a nonlinear k-ω model, for a chord based Reynolds number Rec ∼ 4.8105 . These models provide consistent results in terms of both mean and fluctuating flow quantities. Insight into the instantaneous vorticity field shows that the vortex shedding pattern near the wall is quite well predicted, despite an over-estimated frequency. Downstream, computations always exhibit head-on interactions of the vortices with the airfoil leading edge whereas the experiments show a more variable configuration.

Copyright © 2002 by ASME

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