A new parametrization of the Global Blockage Effect

An existing potential flow model for describing the interaction of complex structures and flow currents is adapted for the modeling of a wind farm. The aim is to investigate if such a simple formulation could improve the representation of the global blockage effect (GBE) in engineering models. The model is then coupled with a parametrization of GBE from LES in order to describe the power extraction redistribution GBE is normally associated with. Despite the original model formulation being found to not apply particularly well to the description of a wind farm, the further development introduces dependency on the atmospheric stratification above the wind farm, a feature of GBE observed in LES. Furthermore, it agrees with the trend of power extraction redistribution in a wind farm. However, more research is necessary to promote a better quantitative match between LES and the proposed model.