The effect of the Coriolis force on the wake of a wind farm in a conventionally neutral and a stable boundary layer is investigated using large eddy simulations. We find that the average ow angle varies with the downstream position in the wind farm. In the entrance region of the wind farm, the ow blockage and wind veer create a positive gradient of the vertical flux (u′u′) at hub-height, which causes a counter-clockwise ow deection in the Northern hemisphere, when observed from above. Further downstream, the vertical entrainment of air from the upper layers of the boundary layer generates a negative gradient of the vertical flux (u′u′) at hub-height, which results in a clockwise ow deection in the Northern hemisphere. The deection is more pronounced for the stable boundary layer than for the conventionally neutral boundary layer. In addition, we find that the wake deection has a significant impact on the power production of turbines further downstream in the wind farm.
|Journal||Journal of physics: Conference series|
|Publication status||Published - 22 Jul 2019|
|Event||Wake Conference 2019 - Visby, Sweden|
Duration: 22 May 2019 → 24 May 2019