On the visualisation of flow structures downstream of fluttering piezoelectric energy harvesters in a tandem configuration

McCarthy, Jesse; Deivasigamani, Arvind; Watkins, Simon; John, Sabu; Coman, F.; Petersen, Phred

doi:10.1016/j.expthermflusci.2014.05.017

Cited by 19 publications

(22 citation statements)

References 19 publications

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“…Analyses of flapping-leaf energy harvesters were also performed by McCarthy et al [128,129] with smoke-flow visualization and tandem harvester arrangements and coauthors Deivasigamani et al [72] with a parallel-flow asymmetric configuration, where the offset of the leaf axes from the stalk axes induced torsional motions of stalk around axis x. It is actually a modal convergence flutter based harvester, yet due to the similar constructions to those by Li and Lipson [127], we put its reviews in this section of cross-flow flutter.…”

Section: Energy Harvesters Based On Cross-flowmentioning

confidence: 99%

Toward Small-Scale Wind Energy Harvesting: Design, Enhancement, Performance Comparison, and Applicability

Zhao

Yang

2017

Shock and Vibration

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The concept of harvesting ambient energy as an alternative power supply for electronic systems like remote sensors to avoid replacement of depleted batteries has been enthusiastically investigated over the past few years. Wind energy is a potential power source which is ubiquitous in both indoor and outdoor environments. The increasing research interests have resulted in numerous techniques on small-scale wind energy harvesting, and a rigorous and quantitative comparison is necessary to provide the academic community a guideline. This paper reviews the recent advances on various wind power harvesting techniques ranging between cm-scaled wind turbines and windmills, harvesters based on aeroelasticities, and those based on turbulence and other types of working principles, mainly from a quantitative perspective. The merits, weaknesses, and applicability of different prototypes are discussed in detail. Also, efficiency enhancing methods are summarized from two aspects, that is, structural modification aspect and interface circuit improvement aspect. Studies on integrating wind energy harvesters with wireless sensors for potential practical uses are also reviewed. The purpose of this paper is to provide useful guidance to researchers from various disciplines interested in small-scale wind energy harvesting and help them build a quantitative understanding of this technique.

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Section: Energy Harvesters Based On Cross-flowmentioning

confidence: 99%

Toward Small-Scale Wind Energy Harvesting: Design, Enhancement, Performance Comparison, and Applicability

Zhao

Yang

2017

Shock and Vibration

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“…Researchers have also experimented using multiple harvesters [32], McCarthy et al [33] proved that the trailing harvester produced 20 percent [34] and 40 percent [35] more power when two harvesters are placed in tandem. a) b) Fig.…”

Section: Natural Excitationmentioning

confidence: 99%

Performance improvement of piezoelectric materials in energy harvesting in recent days – a review

Varadha¹,

Rajakumar²

2018

J. vibroeng.

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Piezoelectric elements are inevitable in modern day physics playing a vital role in many applications. Any piezoelectric element requires compression to produce energy in the form of a weak electrical ac signal. Mechanical vibrations are known to cause deflections which are enough to produce energy from the piezoelectric materials. In this paper, a review of the piezoelectric materials is made on their basic modes of excitation for producing energy. Also, various mechanisms and techniques used to harvest energy recently are presented and discussed extensively. Piezoelectric energy harvesting using MEMS is emphasized much as this is the era of micromechanical systems. Most of the piezoelectric energy harvesting systems relies on cantilever-oriented deflection to produce maximum vibration. In general cantilever beams fitted with piezoelectric materials produce electrical energy from mechanical vibration when deflected; hence detailed review on the different shapes of cantilever is also submitted. Significant parameters contributing to improved performance are dealt with special importance.

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“…Other configurations explored for energy harvesting with flexible piezoelectric elements include the L-shaped flapping leaves proposed by Li et al [24], the triangular flapping leaves proposed by McCarty et al [25,26], the artificial grass investigated by Hobeck and Inman [27], the membranes immersed in the wake of a square cylinder analyzed by Shi et al [28,29], and the cantilever piezoelectric solar harvester proposed by Erturk and Delporte [30]. This latter study, in particular, was the first to demonstrate the potential of simultaneously harvesting kinetic energy from fluid flow and solar energy, albeit using a configuration significantly different from the inverted flags of interest here.…”

Section: Introductionmentioning

confidence: 99%

An Experimental and Computational Study on Inverted Flag Dynamics for Simultaneous Wind–Solar Energy Harvesting

Cioncolini

Nabawy

Silva-Leon

et al. 2019

Fluids

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This paper presents results from experiments and simplified numerical simulations on the flow-induced dynamics and power generation of inverted flags that combine flexible piezoelectric strips with photovoltaic cells to simultaneously harvest kinetic wind energy and solar radiant energy. Experiments were conducted in a wind tunnel under controlled wind excitation and light exposure, focusing in particular on the dynamics and power generation of the inverted flag harvester. Numerical simulations were carried out using a lattice-Boltzmann fluid solver coupled with a finite element structural solver via the immersed-boundary method, focusing in particular on minimizing the simulation run time. The power generated during the tests shows that the proposed inverted flag harvester is a promising concept, capable of producing enough power (on the order of 1 mW) to supply low-power electronic devices in a range of applications where distributed power generation is needed. Notwithstanding key simplifications implemented in the numerical model to achieve a fast execution, simulations and measurements are in good agreement, confirming that the lattice-Boltzmann method is a viable and time-effective alternative to classic Navier–Stokes-based solvers when dealing with strongly coupled fluid–structure interaction problems characterized by large structural displacements.

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On the visualisation of flow structures downstream of fluttering piezoelectric energy harvesters in a tandem configuration

Cited by 19 publications

References 19 publications

Toward Small-Scale Wind Energy Harvesting: Design, Enhancement, Performance Comparison, and Applicability

Toward Small-Scale Wind Energy Harvesting: Design, Enhancement, Performance Comparison, and Applicability

Performance improvement of piezoelectric materials in energy harvesting in recent days – a review

An Experimental and Computational Study on Inverted Flag Dynamics for Simultaneous Wind–Solar Energy Harvesting

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