Atmospheric and Wake Turbulence Impacts on Wind Turbine Fatigue Loadings [electronic resource] : Preprint

• Ngôn ngữ: eng
• Ký hiệu phân loại: 621.531 Applied physics
• Thông tin xuất bản: Washington, D.C. : Oak Ridge, Tenn. : United States. Dept. of Energy. Office of Energy Efficiency and Renewable Energy ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2011
• Mô tả vật lý: Size: 1.6 MB : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 257462
• Chủ đề: 1. 17 wind energy; 2. Boundary layers; 3. Instability; 4. Large-eddy simulation; 5. Rotors

Tóm tắt

Large-eddy simulations of atmospheric boundary layers under various stability and surface roughness conditions are performed to investigate the turbulence impact on wind turbines. In particular, the aeroelastic responses of the turbines are studied to characterize the fatigue loading of the turbulence present in the boundary layer and in the wake of the turbines. Two utility-scale 5 MW turbinesthat are separated by seven rotor diameters are placed in a 3 km by 3 km by 1 km domain. They are subjected to atmospheric turbulent boundary layer flow and data is collected on the structural response of the turbine components. The surface roughness was found to increase the fatigue loads while the atmospheric instability had a small influence. Furthermore, the downstream turbines yieldedhigher fatigue loads indicating that the turbulent wakes generated from the upstream turbines have significant impact.