Contributions of the stochastic shape wake model to predictions of aerodynamic loads and power under single wake conditions [electronic resource]

• Ngôn ngữ: eng
• Ký hiệu phân loại: 621.643 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, 2016
• Mô tả vật lý: Size: Article No. 082006 : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 257387
• Chủ đề: 1. 17 wind energy; 2. Modeling; 3. Shape asymmetry; 4. Simulation; 5. Wake meandering

Tóm tắt

The contribution of wake meandering and shape asymmetry to load and power estimates is quantified by comparing aeroelastic simulations initialized with different inflow conditions: an axisymmetric base wake, an unsteady stochastic shape wake, and a large-eddy simulation with rotating actuator-line turbine representation. Time series of blade-root and tower base bending moments are analyzed. We find that meandering has a large contribution to the fluctuation of the loads. Moreover, considering the wake edge intermittence via the stochastic shape model improves the simulation of load and power fluctuations and of the fatigue damage equivalent loads. Furthermore, these results indicate that the stochastic shape wake simulator is a valuable addition to simplified wake models when seeking to obtain higher-fidelity computationally inexpensive predictions of loads and power.