Why the Coriolis force turns a wind farm wake to the right in the Northern Hemisphere

The Science of Making Torque from Wind

Van Der Laan, M.P.^1 ; Sørensen, N.N.^1

Technical University of Denmark, DTU Wind Energy, Risø Campus, Frederiksborgvej 399, Roskilde

4000, Denmark^1

关键词: Cross-flow direction;    Momentum balances;    Northern Hemispheres;    Reynolds-averaged navier-stokes simulations;    Roughness change;    Turbulent mixing;    Wind farm;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/753/3/032031/pdf
DOI  :  10.1088/1742-6596/753/3/032031

来源: IOP

【 摘 要 】

The interaction between the Coriolis force and a wind farm wake is investigated by Reynolds-Averaged Navier-Stokes simulations, using two different wind farm representations: a high roughness and 5×5 actuator disks. Surprisingly, the calculated wind farm wake deflection is opposite in the two simulations. A momentum balance in the cross flow direction shows that the interaction between the Coriolis force and the 5 × 5 actuator disks is complex due to turbulent mixing of fresh momentum from above into the wind farm, which is not observed for the interaction between the Coriolis force and a roughness change.