Abstract
A Reynolds-averaged Navier-Stokes code is used to simulate the interaction of two neighboring wind farms. The influence of the Coriolis force is investigated by modeling the atmospheric surface/boundary layer with three different methodologies. The results show that the Coriolis force is negligible for a single wind turbine, small for a single wind farm, but important for simulations of wind farm wake interaction.
Highlights
A large number of off-shore wind farms are planned to be build in the North Sea with a relatively close wind farm spacing
The effect of the Coriolis force on wind farm wake interaction is investigated in Reynolds-averaged Navier-Stokes (RANS)
The atmospheric boundary layer (ABL) methods predict a turbulent length scale at hub height that is half of the one simulated by the atmospheric surface layer (ASL) method, which delays the wake recovery
Summary
A large number of off-shore wind farms are planned to be build in the North Sea with a relatively close wind farm spacing. RANS does not require large computational resources compared with LES, because RANS is steady state and it allows a relative coarse grid (e.g. a cell spacing of 1/8 of the rotor diameter), while LES is transient and a fine grid is necessary to resolve the important turbulent scales. This enables us to use the RANS setup for large domains, e.g. a wind farm cluster covering an area of 100 km, which requires a grid size in the order of 100 million cells
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