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Comparative study of the performances of a bio-inspired flexible-bladed wind turbine and a rigid-bladed wind turbine in centimeter-scale

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  • Chu, Yung-Jeh
  • Lam, Heung-Fai

Abstract

The objective of this study was to investigate the behavior and performance of a novel flexible-bladed wind turbine (FBWT). A bio-inspired flexible-bladed centimeter-scale wind turbine was proposed, fabricated, and tested in a closed-loop wind tunnel. The performance of the FBWT was compared with that of a rigid-bladed wind turbine (RBWT) on four main aspects: electrical power output, start-up, blade coning, and yawing. The results showed that the FBWT had a higher power output than the RBWT: the maximum power coefficient, CP, for the FBWT was 0.0870 at a tip speed ratio, TSR, of 3.20 and a wind speed of 1.83 m/s, while that for the RBWT was 0.0576 at a TSR of 3.56 and a wind speed of 2.04 m/s. The total time of the yawing phases with a 180° yaw-error angle was 6.12 s for the FBWT, which was 35.85% shorter than that of the RBWT. The blade-coning video footage showed that the blades of the FBWT underwent a substantial deformation and exhibited a passive pitching mechanism. These features allowed the FBWT to rotate and yaw faster than the RBWT. These results demonstrate the advantage of using biomimicry-based design and flexible materials for the fabrication of centimeter-scale wind turbines.

Suggested Citation

  • Chu, Yung-Jeh & Lam, Heung-Fai, 2020. "Comparative study of the performances of a bio-inspired flexible-bladed wind turbine and a rigid-bladed wind turbine in centimeter-scale," Energy, Elsevier, vol. 213(C).
    • Handle: RePEc:eee:energy:v:213:y:2020:i:c:s0360544220319423
    DOI: 10.1016/j.energy.2020.118835
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    References listed on IDEAS

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    Cited by:

    1. Koca, Kemal & Genç, Mustafa Serdar & Ertürk, Sevde, 2022. "Impact of local flexible membrane on power efficiency stability at wind turbine blade," Renewable Energy, Elsevier, vol. 197(C), pages 1163-1173.
    2. Carré, Aurélien & Gasnier, Pierre & Roux, Émile & Tabourot, Laurent, 2022. "Extending the operating limits and performances of centimetre-scale wind turbines through biomimicry," Applied Energy, Elsevier, vol. 326(C).

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