Scholarlink

Purpose <p>This study introduces an efficient piezoelectric wind energy harvester with an optimized configuration that exploits the synergy between wake-induced and wake-interference galloping. The objective is to enhance energy output and clarify the mechanisms governing synergistic and anti-synergistic interactions among bluff bodies.</p> Methods <p>Full-factorial experiments are performed for various upstream–downstream configurations. A two-way fluid–structure–electrical framework is developed, enabling two finite-element schemes to exchange data via user-defined functions. Based on the extended Hamilton principle, a coupled model is formulated, modal-discretized, and iteratively solved to convergence.</p> Results <p>The optimal setup yields 5.29 mW at 10&#xa0;m/s and an averaged power density of 0.4041 mW/cm³, outperforming conventional wake-galloping energy harvesters. Simulations agree closely with experiments, validating the proposed framework. Finite-time Lyapunov analyses clarify vortex behaviors and reveal both synergistic and anti-synergistic wake-galloping configurations.</p> Conclusion <p>The performance of the proposed system can be improved through configurations that promote constructive bluff-body interactions, such as lateral shear confinement or alternating vortex shedding, thereby amplifying unsteady responses and enhancing energy harvesting. Conversely, anti-synergistic effects occur under excessive blockage or flow confinement, suppressing coherent vortex evolution and reducing wake intensity. These insights provide guidance for designing advanced energy harvesters utilizing wake-galloping mechanisms.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Enhancing Energy Harvesting Performance Utilizing Synergy Between Two Wake-Galloping Mechanisms

  • 期刊论文

  • 发表日期：

    2026年1月29日

查看全文
  • Ji-Heon Baek,
  • Kai Xue,
  • Young sup Kim,
  • Yonghao Liu,
  • Donghyeon Kim,
  • Jaeyoung Bae,
  • Seungmin Yang,
  • Jimin Im,
  • Jongwon Seok

摘要

Purpose

This study introduces an efficient piezoelectric wind energy harvester with an optimized configuration that exploits the synergy between wake-induced and wake-interference galloping. The objective is to enhance energy output and clarify the mechanisms governing synergistic and anti-synergistic interactions among bluff bodies.

Methods

Full-factorial experiments are performed for various upstream–downstream configurations. A two-way fluid–structure–electrical framework is developed, enabling two finite-element schemes to exchange data via user-defined functions. Based on the extended Hamilton principle, a coupled model is formulated, modal-discretized, and iteratively solved to convergence.

Results

The optimal setup yields 5.29 mW at 10 m/s and an averaged power density of 0.4041 mW/cm³, outperforming conventional wake-galloping energy harvesters. Simulations agree closely with experiments, validating the proposed framework. Finite-time Lyapunov analyses clarify vortex behaviors and reveal both synergistic and anti-synergistic wake-galloping configurations.

Conclusion

The performance of the proposed system can be improved through configurations that promote constructive bluff-body interactions, such as lateral shear confinement or alternating vortex shedding, thereby amplifying unsteady responses and enhancing energy harvesting. Conversely, anti-synergistic effects occur under excessive blockage or flow confinement, suppressing coherent vortex evolution and reducing wake intensity. These insights provide guidance for designing advanced energy harvesters utilizing wake-galloping mechanisms.