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Biomimetic swallowtail V-shaped attachments for enhanced low-speed wind energy harvesting by a galloping piezoelectric energy harvester

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  • Zhou, Zhiyong
  • Cao, Di
  • Huang, Haobo
  • Qin, Weiyang
  • Du, Wenfeng
  • Zhu, Pei

Abstract

Efficient low wind speed energy harvesting is pivotal in expanding the reach of sustainable wind power to regions with limited wind resources. This paper introduces an innovative approach to enhance wind energy harvesting efficiency in low wind speed environments through the development of a biomimetically inspired design featuring V-shaped attachments on a square bluff body. Drawing inspiration from the swallowtail, these attachments are engineered to manipulate airflow, creating an asymmetrical pressure field that significantly improves the vibration amplitude of the harvesting device. The proposed design is tested in wind tunnel experiments, demonstrating a 32 % reduction in cut-in wind speed and a significant increase in power output at the lowest tested wind speed of 1.7 m/s, compared to traditional designs. Computational fluid dynamics simulations further elucidate the mechanism behind the enhanced energy harvesting, highlighting the role of V-shaped attachments in generating stronger and more stable vortex shedding, crucial for efficient energy harvesting. The proposed attachments not only substantially reduce the cut-in wind speed of galloping but also significantly increase the device's power output, demonstrating the potential of this design for expanding the viability of wind energy in regions with limited wind resources.

Suggested Citation

  • Zhou, Zhiyong & Cao, Di & Huang, Haobo & Qin, Weiyang & Du, Wenfeng & Zhu, Pei, 2024. "Biomimetic swallowtail V-shaped attachments for enhanced low-speed wind energy harvesting by a galloping piezoelectric energy harvester," Energy, Elsevier, vol. 304(C).
    • Handle: RePEc:eee:energy:v:304:y:2024:i:c:s0360544224018371
    DOI: 10.1016/j.energy.2024.132063
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    References listed on IDEAS

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    1. Sajib Roy & Md Humayun Kabir & Md Salauddin & Miah A. Halim, 2022. "An Electromagnetic Wind Energy Harvester Based on Rotational Magnet Pole-Pairs for Autonomous IoT Applications," Energies, MDPI, vol. 15(15), pages 1-14, August.
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    4. Kaiyuan Zhao & Qichang Zhang & Wei Wang, 2019. "Optimization of Galloping Piezoelectric Energy Harvester with V-Shaped Groove in Low Wind Speed," Energies, MDPI, vol. 12(24), pages 1-18, December.
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