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Smart pro-active pitch adjustment for VAWT blades: Potential for performance improvement

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  • Manfrida, Giampaolo
  • Talluri, Lorenzo

Abstract

Vertical-Axis Wind Turbines are an appreciated design for small-scale units (Re < 5*105, P < 15 kW), with demonstrated reliability and performance levels comparable, at such scales, to horizontal-axis design and also present significant benefits (no sensitivity to wind direction, simple construction). However, the fluid dynamics performance is limited by operating the airfoils at limited Reynolds numbers (10^4 < Re < 5*105), consequently with a poor response to high incidence conditions. A potential improvement is to use morphing blades, or – as a starting point – to reduce dynamically the angle of attack through pitch adjustment. A multiple-stream tube double-actuator disk model, including dynamic stall treatment, was modified to evaluate the effect of different possible control laws for dynamic pitch adjustment. The results show that the margin for performance improvement is relevant, and that a moderate amplitude of pitch excursion can be sufficient, which is technically feasible using fast-response actuators.

Suggested Citation

  • Manfrida, Giampaolo & Talluri, Lorenzo, 2020. "Smart pro-active pitch adjustment for VAWT blades: Potential for performance improvement," Renewable Energy, Elsevier, vol. 152(C), pages 867-875.
    • Handle: RePEc:eee:renene:v:152:y:2020:i:c:p:867-875
    DOI: 10.1016/j.renene.2020.01.021
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    References listed on IDEAS

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    1. MacPhee, David W. & Beyene, Asfaw, 2015. "Experimental and Fluid Structure Interaction analysis of a morphing wind turbine rotor," Energy, Elsevier, vol. 90(P1), pages 1055-1065.
    2. Rezaeiha, Abdolrahim & Kalkman, Ivo & Blocken, Bert, 2017. "Effect of pitch angle on power performance and aerodynamics of a vertical axis wind turbine," Applied Energy, Elsevier, vol. 197(C), pages 132-150.
    3. Islam, Mazharul & Ting, David S.-K. & Fartaj, Amir, 2008. "Aerodynamic models for Darrieus-type straight-bladed vertical axis wind turbines," Renewable and Sustainable Energy Reviews, Elsevier, vol. 12(4), pages 1087-1109, May.
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    Cited by:

    1. Hao, Wenxing & Li, Chun, 2020. "Performance improvement of adaptive flap on flow separation control and its effect on VAWT," Energy, Elsevier, vol. 213(C).
    2. Liu, Qingsong & Miao, Weipao & Ye, Qi & Li, Chun, 2022. "Performance assessment of an innovative Gurney flap for straight-bladed vertical axis wind turbine," Renewable Energy, Elsevier, vol. 185(C), pages 1124-1138.

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