A novel passive flow control technique using circular arcs coupled with downstream splitters

Eydi, Faezeh; Mojra, Afsaneh; Kamel, Hooman

doi:10.1016/j.oceaneng.2024.119393

Ocean Engineering

2024

DOI: 10.1016/j.oceaneng.2024.119393

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A novel passive flow control technique using circular arcs coupled with downstream splitters

Faezeh Eydi,

Afsaneh Mojra,

Hooman Kamel

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Multi-directional and multi-modal vortex-induced vibrations for wind energy harvesting

Xia,

Tang,

Yin

et al. 2024

Applied Physics Letters

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A conventional vortex-induced vibration (VIV)-based energy harvester is typically restricted to capturing wind energy from a very limited range of wind directions, making it inefficient in varying wind conditions. This Letter proposes a tri-section beam configuration for VIV-based piezoelectric energy harvester to enable harnessing wind energy from varying incident angle with different vibration modes being triggered. The finite element analysis investigates the tri-section beam harvester's mode shapes and natural frequencies. A wind tunnel experiment is conducted for a comparative study of the energy output performance of the harvesters with straight and tri-section beams. The findings show that the proposed harvester with the tri-section beam can efficiently capture wind energy from a much wider range of incident angles, as opposed to the specific limited directions of its counterpart with the straight beam. The proposed harvester can also widen the lock-in speed range with a higher bending mode being triggered and achieve the optimal output power of 1.388 mW when the proposed harvester works in the second mode at a higher natural frequency, superior to that of its counterpart (0.386 mW) that can only work in the first mode. The proposed configuration sheds light on developing multi-directional and multi-modal VIV-based energy harvesters adapted to wind conditions in natural environments.

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Multi-directional and multi-modal vortex-induced vibrations for wind energy harvesting

Xia,

Tang,

Yin

et al. 2024

Applied Physics Letters

View full text Add to dashboard Cite

show abstract

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A novel passive flow control technique using circular arcs coupled with downstream splitters

Cited by 1 publication

References 76 publications

Multi-directional and multi-modal vortex-induced vibrations for wind energy harvesting

Multi-directional and multi-modal vortex-induced vibrations for wind energy harvesting

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