Effect of a synthetic low-level jet on the mean power and momentum transport of a model wind-turbine arra

Nocturnal low-level jet (LLJ) is a distinctive phenomenon at the top of stable boundary layers. Distinctive low-level velocity peak results in attractive power resource for wind turbines. However, a maximum in the mean wind speed profile implies the co-existence of positive and negative mean shear in the vicinity of the peak. To gain better understanding of the impacts of LLJ on wind turbines, well-controlled wind tunnel experiments were performed using particle imaging velocimetry (PIV) on model wind turbine arrays including power measurements.
The results from single turbine and 3×2 turbines array in the positive and negative shear regions of the synthetic LLJ were compared to canonic neutrally stratified boundary layer.
We will discuss on the role of energy entrainment induced by the positive and negative shear of the LLJ and the contribution to the vertical transport of momentum and kinetic energy across the turbine array.