Journal ArticleDOI
Effects of installation position of fin-shaped rods on wind-induced vibration and energy harvesting of aeroelastic energy converter
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In this paper, the influence of fin-shaped rods (FSR) with different installation positions on wind-induced vibration and energy harvesting of a cylinder-based aeroelastic energy harvester is studied by experiments and simulations.Abstract:
The influence of fin-shaped rod (FSR) with different installation positions on wind-induced vibration and energy harvesting of a cylinder-based aeroelastic energy harvester are studied by experiments and simulations. Two FSRs are installed symmetrically on the surface of a circular cylinder, and the coverage angle of each FSR is 20°. The installation position of FSRs on the cylinder is represented by the placement angle, θ, which varies in the range of ±160°. And the tested wind speed range is 0–6.8 m s−1. The results show that FSRs change the position of the separation point of the boundary shear layers, further affect the formation and shedding of vortices. Then the force on the cylinder changes, which causes the energy harvester to produce different vibration responses and energy outputs. When 0° < θ < 70°, back-to-back vortex-induced vibration (VIV) and galloping can be observed for FSR-cylinder, and the output power increases with the increase of wind speed, the maximum output voltage and power reach 18.1 V and 1.645 mW. For 70° ⩽ θ < 120°, the vibration of FSR-cylinder is suppressed, which is not conducive for energy harvesting. When 120° < θ ⩽ 160°, the vibration of FSR-cylinder firstly experiences VIV and then galloping occurs after reaching the critical wind speed.read more
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Journal ArticleDOI
Perspectives in flow-induced vibration energy harvesting
TL;DR: Machine-learning approaches, the versatility of metamaterials, and more advanced interface circuits should receive more attention from researchers, since these cutting-edge techniques may have the potential to address the multi-physics modeling problem of FIV energy harvesters and significantly improve the operation performance.
Journal Article
VIVACE (Vortex Induced Vibration Aquatic Clean Energy). A new concept in generation of clean and renewable energy from fluid flow
TL;DR: The vortex induced vibration aquatic clean energy (VIVACE) converter as mentioned in this paper is based on the idea of maximizing rather than spoiling vortex shedding and exploiting rather than suppressing VIV.
Journal ArticleDOI
Stochastic analysis of a galloping-random wind energy harvesting performance on a buoy platform
TL;DR: In this article, a galloping-random wind energy harvester is proposed to simultaneously harvest galloping energy due to the aero-instability and stochastic vibration energy.
Journal ArticleDOI
Piezoelectric energy harvesting from vortex-induced vibration of a circular cylinder: Effect of Reynolds number
Mingjie Zhang,Chengyun Zhang,Abdessattar Abdelkefi,Haiyan Yu,Oleg Gaidai,Xiang Qin,Hongjun Zhu,Junlei Wang +7 more
TL;DR: In this paper, the effects of the Reynolds number on the piezoelectric energy harvesting from vortex-induced vibrations (VIV) of a circular cylinder are investigated. And the results also show that the performance of a VIV-based piezolectric EH harvester is more sensitive to the Reynolds numbers for a case with low mechanical damping ratio.
Journal ArticleDOI
Enhancing energy harvesting from flow-induced vibrations of a circular cylinder using a downstream rectangular plate: An experimental study
Junlei Wang,Chengyun Zhang,Mingjie Zhang,Abdessattar Abdelkefi,Haiyan Yu,Xiaomeng Ge,Huadong Liu +6 more
TL;DR: In this article, the authors proposed placing an interference rectangular plate in the wake of the circular cylinder with determining the most effective design of the rectangular plate location and dimension, and a series of wind tunnel experiments were conducted to prove the usefulness of the downstream rectangular plate and how it positively or negatively affect the harvester's efficacy.
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The Energy Harvesting Eel: a small subsurface ocean/river power generator
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A brief review of recent results in vortex-induced vibrations
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