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<p>This study explores the energy-harvesting potential of a pivoted cylinder subjected to vortex-induced vibrations (VIV) without elastic support. Through theoretical analysis, experimental evaluation, and numerical simulations using a wake oscillator model, the dynamics of the cylinder are examined under the influence of drag-induced restoring forces. Experiments reveal the significant impact of mass and arm length ratios on oscillation amplitude and frequency, demonstrating a broad velocity range with sustained high-amplitude vibrations suitable for energy-harvesting applications. While the wake oscillator model provides valuable insights into the system’s dynamics and captures general trends, it exhibits limitations in accurately predicting certain experimental observations. Despite these limitations, simulations confirm the feasibility of efficient energy conversion, achieving a maximum efficiency of 12% under optimal conditions. This novel configuration offers a promising alternative for sustainable energy solutions, particularly in low-velocity watercourses.</p>

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Energy-harvesting based on the VIV of a pivoted cylinder without elastic support

  • 期刊论文

  • 发表日期：

    2026年2月27日

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  • Yang Qu,
  • Wenjie Xu,
  • Zhi Zhang,
  • Zhaoqing Feng,
  • Xuanjie Guo,
  • Ruiping Zhi

摘要

This study explores the energy-harvesting potential of a pivoted cylinder subjected to vortex-induced vibrations (VIV) without elastic support. Through theoretical analysis, experimental evaluation, and numerical simulations using a wake oscillator model, the dynamics of the cylinder are examined under the influence of drag-induced restoring forces. Experiments reveal the significant impact of mass and arm length ratios on oscillation amplitude and frequency, demonstrating a broad velocity range with sustained high-amplitude vibrations suitable for energy-harvesting applications. While the wake oscillator model provides valuable insights into the system’s dynamics and captures general trends, it exhibits limitations in accurately predicting certain experimental observations. Despite these limitations, simulations confirm the feasibility of efficient energy conversion, achieving a maximum efficiency of 12% under optimal conditions. This novel configuration offers a promising alternative for sustainable energy solutions, particularly in low-velocity watercourses.