To further understand the spatial distribution characteristics of velocity attenuation in the whole wake region, a three-dimensional full wake model is proposed in this paper. Firstly, the high-order Gaussian function is used to predict the wake profile, which evolves from the top-hat shape in the near wake region to the Gaussian shape in the far wake region. Secondly, considering the effect of wind shear, the wind speed difference between wind shear inflow and uniform inflow is introduced; In addition, considering the anisotropy of wake expansion, different wake expansion coefficients are adopted in the vertical and horizontal directions; Finally, the accuracy of the proposed three-dimensional full wake model is verified by wind field experiments. The results show that the relative errors of the proposed full wake model are basically within 5%, which can better predict the three-dimensional distribution of the entire wake region.
Key words
wind turbines /
wake model /
wind shear /
wind field experiment /
high-order Gaussian function
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References
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