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Energy Harnessing Performance of Oscillating Foil Submerged in the Wake of a Fixed Cylinder

Author

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  • Yongqing Luo

    (Southampton Ocean Engineering Joint Institution, Harbin Engineering University, Harbin 150001, China)

  • Houxian Wu

    (Southampton Ocean Engineering Joint Institution, Harbin Engineering University, Harbin 150001, China)

  • Shuhan Huang

    (Qingdao Qingtie Environmental Protection Technology, Qingdao Metro, Qingdao 266000, China)

  • Hai Sun

    (College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, China
    Marine Renewable Energy Laboratory, Department of Naval Architecture & Marine Engineering, University of Michigan, 2600 Draper Road, Ann Arbor, MI 48109, USA)

Abstract

The energy harnessing from flow-induced vibrations (FIV) by an oscillating foil placed tandemly behind a circular cylinder (which serves as a vortex generator) is investigated. The foil is submerged in the wake produced by the fixed cylinder and could oscillate in the direction perpendicular to the incoming flow with single-degree freedom. The spacing ratio ranges from 1.0 to 5.0. The oncoming fluid velocity is U = 1–10 m/s, corresponding to the reduced velocity U r = 3.81–38.08 and the Reynolds number Re = 9.58 × 10 3 –9.58 × 10 4 . Four harnessing damping ratios ( ζ harness = 0.0054–0.0216) are used to simulate the energy conversion conditions. The main conclusions are: (1) The optimal oscillation pattern related to the highest harnessed energy emerges as the spacing ratio close to 1.0. (2) The airflow energy converted by the foil is positively correlated with the harnessing damping ratio because the amplitude responses are similar at various harnessing damping ratios. A high velocity yields the highest harnessed power. (3) The harnessing efficiency of the foil could reach 48.89%, which is much more than that of an isolated flapping foil.

Suggested Citation

  • Yongqing Luo & Houxian Wu & Shuhan Huang & Hai Sun, 2024. "Energy Harnessing Performance of Oscillating Foil Submerged in the Wake of a Fixed Cylinder," Energies, MDPI, vol. 17(8), pages 1-21, April.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:8:p:1793-:d:1372406
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    References listed on IDEAS

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    1. Chen, Zhenlin & Alam, Md. Mahbub & Qin, Bin & Zhou, Yu, 2020. "Energy harvesting from and vibration response of different diameter cylinders," Applied Energy, Elsevier, vol. 278(C).
    2. Li, Ningyu & Park, Hongrae & Sun, Hai & Bernitsas, Michael M., 2022. "Hydrokinetic energy conversion using flow induced oscillations of single-cylinder with large passive turbulence control," Applied Energy, Elsevier, vol. 308(C).
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