Effect of conventionally neutral boundary layer height on turbine performance and wake mixing in offshore windfarms
Sood, I.; Munters, W.; Meyers, J. (2020). Effect of conventionally neutral boundary layer height on turbine performance and wake mixing in offshore windfarms. Journal of Physics: Conference Series 1618(6): 062049. https://dx.doi.org/10.1088/1742-6596/1618/6/062049
In: Journal of Physics: Conference Series. IOP Publishing: Bristol. ISSN 1742-6588; e-ISSN 1742-6596, meer
In this study, we investigate the effect of conventionally neutral boundary layer height and capping inversion strength on wind farm performance. An aeroelastic multibody solver coupled with a pseudo-spectral large eddy simulation code is used to investigate the structural and aerodynamic output of wind turbines in 4 different inflow types. Farm layouts comprising of turbines in both aligned and staggered arrangements are studied. It is found that the shallower boundary layers with strong capping inversions are characterized by oscillatory structures in turbine wakes, leading to increased structural damage in downstream wind turbines due to fatigue. The power output is also observed to decrease due to poorer wake mixing.
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