Abstract
In this study, which was part of the project AssiSt, numerical analyses of wind turbine power, loads and wake development in the extreme wind conditions found on a complex terrain site in northern Spain have been performed. The turbine is located near the edge of a characteristic cliff. Realistic atmospheric inflow conditions are prescribed by propagation of highly resolved meteorologic data of the LES code PALM in the aerodynamic solver FLOWer. The global features of the flow field in the complex terrain site were investigated showing significant inclination angles, high turbulence intensities and a characteristic mixing mechanism of high and low momentum velocity layers. Further, the wake development and its deflection and deformation was analyzed. Finally, the turbine’s load response was investigated, showing severe fatigue loading as consequence of the highly unsteady inflow conditions.
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