INVESTIGATION OF EFFECT OF GURNEY FLAP ON PERFORMANCE OF VERTICAL AXIS WIND TURBINE IN ARRAY CONFIGURATIONS

Ni Lulu; Miao Weipao; Li Chun; Zhu Haitian

doi:10.19912/j.0254-0096.tynxb.2020-0217

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (2) : 365-372. DOI: 10.19912/j.0254-0096.tynxb.2020-0217

INVESTIGATION OF EFFECT OF GURNEY FLAP ON PERFORMANCE OF VERTICAL AXIS WIND TURBINE IN ARRAY CONFIGURATIONS

Ni Lulu¹, Miao Weipao^1,2, Li Chun^1,2, Zhu Haitian¹

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Abstract

To investigate the effect of Gurney flap on the aerodynamic performance of the vertical axis wind turbine （VAWT） in array configurations, the computational fluid dynamics （CFD） simulations aimed at straight blade vertical axis wind turbine by means of the TSST turbulence model is presented. The results indicate that： with the tip speed ratio of upstream paired VAWTs in array configurations increasing, the phenomenon of flow velocity acceleration though the gap of the configrations is more obvious, which makes the aerodynamic performance of the VAWTs in array configurations be better than that of isolated wind turbine. The Gurney flap can improve significantly the power extraction of the isolated VAWT in low-medium tip speed ratio region while in relatively high tip speed ratio region, the improvement effect is not obvious. The installations of Gurney flap on the VAWT array configurations can optimize the wake flow filed of upstream turbines and increase the acceleration effect of the gap between upstream turbines, so that the downstream rotor achieves higher power coefficient. When vertical axis wind turbine farm configurations with Gurney flap adopted staggered arrangement pattern, the downstream wind turbine can utilize the both advantages of blockage effects and the Gurney flap, leading to a significantly enhancement of the average tangential force of the single blade compared to isolated machine. Meanwhile, the average value of the tangential force of the three machines in the wind farm is higher than that of the isolated wind turbine, and the overall performance of the wind turbines in the wind farm is improved.

Key words

vertical axis wind turbines / numerical simulation / aerodynamic characteristics / Gurney flap / wind farm

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Ni Lulu, Miao Weipao, Li Chun, Zhu Haitian. INVESTIGATION OF EFFECT OF GURNEY FLAP ON PERFORMANCE OF VERTICAL AXIS WIND TURBINE IN ARRAY CONFIGURATIONS[J]. Acta Energiae Solaris Sinica. 2022, 43(2): 365-372 https://doi.org/10.19912/j.0254-0096.tynxb.2020-0217

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