Large Eddy Simulation of clearings in forest and their effect on wind turbines
The approach in this work is to use Computational Fluid Dynamics (CFD) with the Large Eddy Simulation (LES) turbulence model coupled to an aero elastic solver that solves the dynamic response of the wind turbine.
Here Ryningsnäs in Sweden is investigated with a homogeneous forest, the current clearing and an extended clearing. The electrical generator power was highest for the current clearing. But the fatigue loads were both higher and lower than the homogeneous forest depending on which part of the wind turbine that was investigated. The extended clearing nearly always had the lowest fatigue loads but unfortunately also the lowest electrical generator power. Further optimization of the clearings and the wind turbine locations in relation to them is needed to find the sweet spot where the fatigue loads are lower and the electrical generator power is higher.
Chalmers, Mekanik och maritima vetenskaper, Strömningslära
C3SE (Chalmers Centre for Computational Science and Engineering)
Strömningsmekanik och akustik
Chalmers tekniska högskola
EA, Hörsalsvägen 11
Opponent: Stefan Ivanell, Uppsala universitet, Sverige