ACTIVE CONTROL OF DYNAMIC STALL OFPITCHING WAVY LEADING-EDGE BLADE

Zou Lin; Miao Yabo; Liu Diwei; Guo Xiaoyu; Wang Nian

doi:10.19912/j.0254-0096.tynxb.2024-1658

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (1) : 674-682. DOI: 10.19912/j.0254-0096.tynxb.2024-1658

ACTIVE CONTROL OF DYNAMIC STALL OFPITCHING WAVY LEADING-EDGE BLADE

Zou Lin, Miao Yabo, Liu Diwei, Guo Xiaoyu, Wang Nian

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Abstract

A numerical model for dynamic stall of the pitching wavy leading-edge blade under plasma excitation was established by employing the sliding mesh technique and SST k-ω turbulence model. The lift and drag, flow structures, and dynamic stall characteristics of pitching （-5°—25°） NACA0012 straight blade and its modified wavy leading-edge blades under different plasma excitation parameters were studied, and the active control mechanism of dynamic stall of the blade with wavy leading-edge blade coupled with plasma excitation was explored. The results show that the wavy leading-edge blade can effectively reduce the peak lift and drag forces and decrease the overturning moment during pitching. After coupling with plasma excitation, the separation vortex of the wavy leading-edge blade separates earlier, and the force drop is reduced during the pitching transition, the area of the lift hysteresis loop is reduced by 23.9%. And the separation vortex generated in the subsequent down-pitching stage is significantly reduced, resulting in smaller force fluctuations, indicating that its controlled performance is superior to that of straight blade. As the plasma excitation voltage amplitude increases, the coupled control effect becomes stronger during the down-pitching transition, further reducing the hysteresis effect of the blade and weakening the oscillation characteristics, effectively improving the dynamic stall performance of the wavy leading-edge blade.

Key words

wind turbine blades / wavy leading-edge / dielectric barrier discharge / lift and drag characteristic / aerodynamic stalling / flow control

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Zou Lin, Miao Yabo, Liu Diwei, Guo Xiaoyu, Wang Nian. ACTIVE CONTROL OF DYNAMIC STALL OFPITCHING WAVY LEADING-EDGE BLADE[J]. Acta Energiae Solaris Sinica. 2026, 47(1): 674-682 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1658

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