Application of a 'parallelized coupled Navier-Stokes/Vortex-Panel solver' to the NREL phase VI rotor

Sven Schmitz, Jean Jacques Chattot

Research output: Contribution to conferencePaper

6 Citations (Scopus)

Abstract

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.

Original languageEnglish (US)
Pages2725-2737
Number of pages13
StatePublished - Dec 1 2005
Event43rd AIAA Aerospace Sciences Meeting and Exhibit - Reno, NV, United States
Duration: Jan 10 2005Jan 13 2005

Other

Other43rd AIAA Aerospace Sciences Meeting and Exhibit
CountryUnited States
CityReno, NV
Period1/10/051/13/05

Fingerprint

Vortex flow
Rotors
Turbulence models
Wind turbines
Flow separation
Airfoils
Turbomachine blades
Turbulent flow
Numerical analysis
Experiments
Costs

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Schmitz, S., & Chattot, J. J. (2005). Application of a 'parallelized coupled Navier-Stokes/Vortex-Panel solver' to the NREL phase VI rotor. 2725-2737. Paper presented at 43rd AIAA Aerospace Sciences Meeting and Exhibit, Reno, NV, United States.
Schmitz, Sven ; Chattot, Jean Jacques. / Application of a 'parallelized coupled Navier-Stokes/Vortex-Panel solver' to the NREL phase VI rotor. Paper presented at 43rd AIAA Aerospace Sciences Meeting and Exhibit, Reno, NV, United States.13 p.
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Schmitz, S & Chattot, JJ 2005, 'Application of a 'parallelized coupled Navier-Stokes/Vortex-Panel solver' to the NREL phase VI rotor' Paper presented at 43rd AIAA Aerospace Sciences Meeting and Exhibit, Reno, NV, United States, 1/10/05 - 1/13/05, pp. 2725-2737.

Application of a 'parallelized coupled Navier-Stokes/Vortex-Panel solver' to the NREL phase VI rotor. / Schmitz, Sven; Chattot, Jean Jacques.

2005. 2725-2737 Paper presented at 43rd AIAA Aerospace Sciences Meeting and Exhibit, Reno, NV, United States.

Research output: Contribution to conferencePaper

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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.

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Schmitz S, Chattot JJ. Application of a 'parallelized coupled Navier-Stokes/Vortex-Panel solver' to the NREL phase VI rotor. 2005. Paper presented at 43rd AIAA Aerospace Sciences Meeting and Exhibit, Reno, NV, United States.