Journal article · Conference paper
A CFD code comparison of wind turbine wakes
A comparison is made between the EllipSys3D and SnS CFD codes. Both codes are used to perform Large-Eddy Simulations (LES) of single wind turbine wakes, using the actuator disk method. The comparison shows that both LES models predict similar velocity deficits and stream-wise Reynolds-stresses for four test cases.
A grid resolution study, performed in EllipSys3D and SnS, shows that a minimal uniform cell spacing of 1/30 of the rotor diameter is necessary to resolve the wind turbine wake. In addition, the LES-predicted velocity deficits are also compared with Reynolds-Averaged Navier Stokes simulations using EllipSys3D for a test case that is based on field measurements.
In these simulations, two eddy viscosity turbulence models are employed: the k- (ε) model and the k- (ε)-fp model. Where the k- (ε) model fails to predict the velocity deficit, the results of the k- (ε)-fP model show good agreement with both LES models and measurements.
| Language: | English |
|---|---|
| Publisher: | IOP Publishing |
| Year: | 2014 |
| Pages: | 012140 |
| Proceedings: | 5th International Conference on The Science of Making Torque from Wind 2014European Academy of Wind Energy : The Science of Making Torque from Wind |
| ISSN: | 17426596 and 17426588 |
| Types: | Journal article and Conference paper |
| DOI: | 10.1088/1742-6596/524/1/012140 |
| ORCIDs: | Laan, van der, Paul Maarten and Sørensen, Niels N. |
