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Dynamic stall control scheme for wind turbines based on distributed dual synthetic jets

Author

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  • Gong, Jianyu
  • Peng, Wenqiang
  • Zhao, Zhijie
  • Luo, Zhenbing
  • Wang, Hao

Abstract

An efficient dynamic stall control scheme of wind turbines is proposed, in which distributed Dual Synthetic Jets (DSJ) are integrated along the upper surface. Influences of momentum coefficient and actuation position on the flow and aerodynamic control characteristics are analyzed. Dynamic Mode Decomposition (DMD) is employed to illustrate the underlying flow control mechanism. Results demonstrate that the low momentum DSJ will reduce net power. This reduction occurs due to weak control and energy consumed by the jet device itself. Conversely, a high-momentum jet effectively suppresses flow separation. It consequently improves the wind energy capture capability of the blade. The net output power coefficient increases from 0.149 to 0.205. This represents an improvement of 37.34 %. For different actuator position combinations, DSJ control applied at both the leading edge and middle yields the best effect. Accounting for the power consumed by the jet device, the net gain in output power coefficient reaches 0.216. This constitutes a 45.38 % increase. DMD results reveal that distributed DSJ control suppresses the dynamic characteristics of the dynamic stall flow field. DMD energy becomes concentrated in the low-order modes. Vortex shedding associated with each mode is reduced. Consequently, the dynamic flow field development shifts towards a static, stable state. The stability of the flow field is significantly enhanced.

Suggested Citation

  • Gong, Jianyu & Peng, Wenqiang & Zhao, Zhijie & Luo, Zhenbing & Wang, Hao, 2025. "Dynamic stall control scheme for wind turbines based on distributed dual synthetic jets," Energy, Elsevier, vol. 340(C).
    • Handle: RePEc:eee:energy:v:340:y:2025:i:c:s0360544225048261
    DOI: 10.1016/j.energy.2025.139184
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    References listed on IDEAS

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