Search for dissertations about: "Wind turbine wake"

Showing result 16 - 20 of 34 swedish dissertations containing the words Wind turbine wake.

2. 16. Development of Vortex Filament Method for Wind Power Aerodynamics

   Author : Hamidreza Abedi; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; unsteady aerodynamic load; atmospheric turbulence; fatigue loads; Free wake model; forest canopy; wind turbine; vortex method; large-eddy simulation;

   Abstract : Wind power is currently one of the cleanest and widely distributed renewable energy sources serving as an alternative to fossil fuel generated electricity. Exponential growth of wind turbines all around the world makes it apt for different research disciplines. READ MORE

4. 17. Wind turbines over a hilly terrain: performance and wake evolution

   Author : Ann Hyvärinen; P. Henrik Alfredsson; Antonio Segalini; Leonardo P. Chamorro; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fluid mechanics; wind turbines; complex terrain; wind-tunnel measurements; Strömningsmekanik; vindturbiner; komplex terräng; vindtunnelmätningar; Engineering Mechanics; Teknisk mekanik;

   Abstract : The aim of this licentiate thesis is to investigate wind-turbines placed in a complex-terrain environment. This is done by studying the flow around small-scale wind-turbine models placed over a landscape model with hills, and by comparing the results with corresponding data obtained over a flat terrain model. READ MORE

5. 18. Aeroacoustic Prediction for Vertical Axis Wind Turbines

   Author : Aya Aihara; Hans Bernhoff; Anders Goude; Mats Åbom; Uppsala universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; fluid; acoustics; noise; sound; wind energy; vertical axis wind turbine; aerodynamics; airfoil; simulations; CFD; LES;

   Abstract : This thesis investigates the aerodynamic and aeroacoustic prediction of vertical axis wind turbines, using computational fluid dynamics simulations. Noise pollution from wind turbines is one of the disadvantages of wind energy, calling for strategies to reduce noise levels. READ MORE

6. 19. Numerical study on instability and interaction of wind turbine wakes

   Author : Sasan Sarmast; Dan. S. Henningson; Per-Åge Krogstad; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Wind turbine wakes; Stability; interaction; POD; DMD; Teknisk mekanik; Engineering Mechanics;

   Abstract : Numerical simulations of the Navier-Stokes equations are conducted to achieve a better understanding of the behavior of wakes generated by the wind turbines. The simulations are performed by combining the in-house developed code EllipSys3D with the actuator line technique. READ MORE

7. 20. Numerical computations of wind turbine wakes and wake interaction

   Author : Karl Nilsson; Dan Henningson; Stefan Ivanell; Thorsten Lutz; KTH; []
   Keywords : ;

   Abstract : When wind turbines are placed in farms, wake effects reduce the overall power production. Also, turbine loads are significantly increased since turbulence levels are high within the wake flow. READ MORE