Aiming at the wind turbine wake interference effects for different layouts, methods of reducing wind turbine wake interference in limited site is explored. Wind turbine wake interference effects for different layouts are studied by numerical simulation, and the most unfavorable working conditions among wake interference effects are selected to limit the size of the site. Then the windbreak wall is added and study on the wake interference effect characteristics of wind turbines is carried out, as the position and height of the windbreak wall change. And the distribution of the wake flow for different layouts, and the wind speed contours, as well as power law of the wake flow interference with windbreak walls are obtained. Effects of windbreak walls with different parameters on the restriction of wake interference are found out. The results show that with the increase of serial interference spacing, the interference effects are gradually weakened. Power increases as the serial interference spacing increases, and the interference effects reach its maximum when serial interference spacing is 3D （D is the diameter of the wind turbine）. The larger the staggered spacing is, the weaker the interference effect is, the slower the wake recovery becomes. The power increases with the increase of staggered spacing. As the staggered spacing increases, interference effects gradually weaken, and the wind speed loss becomes less. The staggered layouts weaken the wake superposition effects and the wake expansion. The closer the distance between the windbreak wall and the wind turbin downstream, the more restriction on the wake of the upstream wind turbine and more improvement on the incoming wind speed of the downstream wind turbine. For windbreak wall at three heights, 25 m is the best for restricting the wake interference effects, and 40 m windbreak wall makes worse is worse than that of 10 m.
Key words
wind turbines /
wake /
wind farm /
wake interference characterization /
windbreak wall layouts /
numerical simulation
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