TY - GEN
T1 - Application of a 'parallelized coupled Navier-Stokes/Vortex-Panel solver' to the NREL Phase VI rotor
AU - Schmitz, Sven
AU - Chattot, Jean Jacques
PY - 2005
Y1 - 2005
N2 - A commercially available Navier-Stokes solver, CFX V5.6, is coupled with an in-house developed Vortex-Panel method for the numerical analysis of wind turbines. The Navier-Stokes zone is confined to the near-field around one wind turbine blade, the Vortex-Panel method models the entire vortex sheet of a two-bladed rotor and accounts for the far-field. This coupling methodology reduces both numerical diffusion and computational cost. The coupled solver is parallelized on a cluster of 4 processors. The parallelized coupled solver (PCS) is applied to some distinctive cases of the NREL Phase VI rotor configuration with and without flow separation under steady and no-yaw conditions. Fully turbulent flow is assumed using the k-ε and k-ω turbulence models. Calculations performed with the coupled solver show very good agreement with experiments for fully attached flow. For separated and partially stalled flow, the k-ε model overpredicts rotor power while the k-ω model still shows better agreement with experiments. Discrepancies between the two turbulence models are related to different prediction of the onset of separation. This is revealed by 2D airfoil data of the S809 profile.
AB - A commercially available Navier-Stokes solver, CFX V5.6, is coupled with an in-house developed Vortex-Panel method for the numerical analysis of wind turbines. The Navier-Stokes zone is confined to the near-field around one wind turbine blade, the Vortex-Panel method models the entire vortex sheet of a two-bladed rotor and accounts for the far-field. This coupling methodology reduces both numerical diffusion and computational cost. The coupled solver is parallelized on a cluster of 4 processors. The parallelized coupled solver (PCS) is applied to some distinctive cases of the NREL Phase VI rotor configuration with and without flow separation under steady and no-yaw conditions. Fully turbulent flow is assumed using the k-ε and k-ω turbulence models. Calculations performed with the coupled solver show very good agreement with experiments for fully attached flow. For separated and partially stalled flow, the k-ε model overpredicts rotor power while the k-ω model still shows better agreement with experiments. Discrepancies between the two turbulence models are related to different prediction of the onset of separation. This is revealed by 2D airfoil data of the S809 profile.
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M3 - Conference contribution
AN - SCOPUS:28844499206
SN - 1563477262
SN - 9781563477263
T3 - Collection of the 2005 ASME Wind Energy Symposium Technical Papers at the 43rd AIAA Aerospace Sciences Meeting and Exhibit
SP - 167
EP - 179
BT - Collection of the 2005 ASME Wind Energy Symposium Technical Papers at the 43rd AIAA Aerospace Sciences Meeting and Exhibit
T2 - 2005 ASME Wind Energy Symposium at the 43rd AIAA Aerospace Sciences Meeting and Exhibit
Y2 - 10 January 2005 through 13 January 2005
ER -