INFLUENCE OF SOLIDITY AND ROTATIONAL INERTIA ON STARTING PERFORMANCE OF H-VAWTS WITH DOUBLE-LAYER BLADE

Li Shoutu; He Kunyun; Li Ye; Bao Yubiao

doi:10.19912/j.0254-0096.tynxb.2024-0762

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (9) : 76-83. DOI: 10.19912/j.0254-0096.tynxb.2024-0762

INFLUENCE OF SOLIDITY AND ROTATIONAL INERTIA ON STARTING PERFORMANCE OF H-VAWTS WITH DOUBLE-LAYER BLADE

Li Shoutu^1,2, He Kunyun^1,2, Li Ye³, Bao Yubiao^1,2

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Abstract

Double-layer blade structure is one of the main methods to improve the starting performance of straight blade vertical axis wind turbines （H-VAWTs）. In this paper, the starting performance of H-VAWTs with double-layer blades under the coupled influence of solidity and moment of inertia is investigated using the dynamic mesh method, and the improvement effect of double-layer blade on the self-starting performance of H-VAWTs under different wind turbine structures is analyzed. The results show that the double-layer blade can effectively improve the startup performance of H-VAWTs, and the startup duration can be shortened by more than 30%; the peak torque of the outer-layer blade in the double-layer blade is not necessarily higher than that of the single-layer blade, but under the interaction of the inner and outer blades, the torque performance of the double-layer blade is significantly better than that of the single-layer blade. Under the conditions of different blade numbers, chord lengths and wind turbine diameters, the double-layer blade H-VAWTs has higher torque peaks at the start-up stage, and the torque peaks appear earlier than the single-layer blade, which results in higher start-up acceleration of the double-layer blade wind turbine, and the wind turbine rotational speed reaches the steady state earlier.

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wind turbines / airfoils / numerical analysis / startup performance / double-layer blade / aerodynamic characteristics

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Li Shoutu, He Kunyun, Li Ye, Bao Yubiao. INFLUENCE OF SOLIDITY AND ROTATIONAL INERTIA ON STARTING PERFORMANCE OF H-VAWTS WITH DOUBLE-LAYER BLADE[J]. Acta Energiae Solaris Sinica. 2025, 46(9): 76-83 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0762

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