Journal ArticleDOI
Investigations on a vortex induced vibration based energy harvester
TLDR
In this article, the effect of the gap between the cylinder and the flapper on the energy harvested was investigated through wind tunnel experiments and numerical simulations, and it was shown that the choice of gap influences the energy harvesting potential of such harvesters.Abstract:
This study investigates energy harvesting from vortex induced vibrations of a flexible cantilevered flapper placed in the wake of a rigid circular cylinder. The effect of the gap between the cylinder and the flapper on the energy harvested is investigated through wind tunnel experiments and numerical simulations. As the flow speed is varied, a transition in the flapper dynamics is observed, which in turn affects the power extracted by the harvester. Numerical investigations reveal that the flapper dynamics is different depending on whether the vortices are shed ahead or behind the flapper. This study concludes that the choice of the gap influences the energy harvesting potential of such harvesters.read more
Citations
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Journal ArticleDOI
Enhancing vortex-induced vibrations of a cylinder with rod attachments for hydrokinetic power generation
TL;DR: In this article, a new converter consisting of a circular cylinder on an end-spring is proposed to harness hydrokinetic power from water flow and tides, which is inspired by the trembling of cables with ice attached in barely noticeable winds.
Journal ArticleDOI
Theoretical modeling, wind tunnel measurements, and realistic environment testing of galloping-based electromagnetic energy harvesters
TL;DR: The present research offers a suggestive guidance on developing an efficient electromagnetic energy harvester for airflow power generation, at the same time it further promotes the realization of self-powering of structural health monitoring sensors applying in buildings and bridges.
Journal ArticleDOI
Design, Modeling, and Experiments of the Vortex-Induced Vibration Piezoelectric Energy Harvester with Bionic Attachments
TL;DR: In the present work, twelve models are designed according to the size of pits and hemispheric protrusions which are added to the surface of a flexible smooth cylinder, showing stronger energy capture performance on the whole and comparing with the smooth cylinder which is taken as a carrier.
Journal ArticleDOI
Enhanced performance of piezoelectric energy harvester through three serial vibrators
TL;DR: In this paper, a piezoelectric harvester array with three identical energy harvesting vibrators arranged in series along the water flow direction is presented, and each EHV consists of a PPEV and three identical EHVs.
Journal ArticleDOI
A Flutter-Based Electromagnetic Wind Energy Harvester: Theory and Experiments
TL;DR: In this paper, an analytical model was proposed for the kinetic analysis of a flutter-based electromagnetic wind energy harvester, which can be used to predict the critical wind speed of a wind belt type energy harvesting.
References
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Journal ArticleDOI
The mechanics of the formation region of vortices behind bluff bodies
TL;DR: In this article, the authors examined the characteristic lengths of the oscillating wakes of bluff bodies and concluded that these are equivalent at high Reynolds number, leading to the conclusion that there are two simultaneous characteristic lengths; the scale of the formation region and the width to which the free shear layers diffuse.
On the drag and shedding frequency of two-dimensional bluff bodies
TL;DR: In this paper, a semi-empirical study of the bluff body problem is presented, where interference elements in the wake close behind a cylinder demonstrate the need for considering that region in any complete theory.
Journal ArticleDOI
Energy harvesting eel
J. J. Allen,Alexander Smits +1 more
TL;DR: In this article, the authors examined the feasibility of placing a piezoelectric membrane or "eel" in the wake of a bluff body and using the von Karman vortex street forming behind the bluff body to induce oscillations in the membrane.
Journal ArticleDOI
Aeroelastic energy harvesting: A review
TL;DR: Recent literature in the field of energy harvesting from aeroelastic vibrations during the last few years is reviewed and Qualitative and quantitative comparisons between different existing flow-induced vibrations energy harvesters are discussed.
Journal ArticleDOI
A review on flow energy harvesters based on flapping foils
Qing Xiao,Qiang Zhu +1 more
TL;DR: An overview of the state-of-the-art investigations on the recently developed oscillating foil energy converters is presented in this article, where a summary of available knowledge and up-to-date progress in the application of such bio-inspired systems for renewable energy devices is provided.