Next Article in Journal
Design of Power Cable Lines Partially Exposed to Direct Solar Radiation—Special Aspects
Previous Article in Journal
Investigation of an Innovative Rotor Modification for a Small-Scale Horizontal Axis Wind Turbine
Open AccessArticle

Flexible Plate in the Wake of a Square Cylinder for Piezoelectric Energy Harvesting—Parametric Study Using Fluid–Structure Interaction Modeling

Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
*
Author to whom correspondence should be addressed.
Energies 2020, 13(10), 2645; https://doi.org/10.3390/en13102645
Received: 2 May 2020 / Revised: 18 May 2020 / Accepted: 19 May 2020 / Published: 22 May 2020
(This article belongs to the Section Sustainable Energy)
Piezoelectric energy harvesters can scavenge energy from their ambient environment in order to power low-consumption electronic devices. The last two decades have seen a growing interest towards vortex-induced vibration harvesters; most harvesters consist in rigid splitter plates oscillating at higher frequencies. The concept presented here is a low-frequency undulating flexible plate placed in the wake of a square cylinder. Piezoelectric patches can be placed at the plate surface to harvest the strain energy arising when the plate bends. The flapping pattern mimics an anguilliform swimming motion. There is a great need to establish correlation between wake generating bluff body size, plate dimensions and power output. Geometric parameters were investigated using water tunnel experiments, particle image velocimetry and fluid–structure interaction modeling. Results showed that for a given plate length and within a given freestream velocity range, there is a square cylinder diameter and a thickness that optimize the plate–wake interaction. Longer plates yield greater power output but have lower flapping frequencies. Additionally, the more frequent curvature changes occurring can result in charge cancellation among the piezoelectric cells. Consequently, the estimated conversion efficiency from mechanical strain to electricity is higher for shorter plates. View Full-Text
Keywords: fluid–structure interaction (FSI); flow-induced vibrations; vortex-induced vibrations; cantilever flexible plate; piezoelectric energy harvester; particle image velocimetry (PIV); renewable energy fluid–structure interaction (FSI); flow-induced vibrations; vortex-induced vibrations; cantilever flexible plate; piezoelectric energy harvester; particle image velocimetry (PIV); renewable energy
Show Figures

Figure 1

MDPI and ACS Style

Binyet, E.M.; Chang, J.-Y.; Huang, C.-Y. Flexible Plate in the Wake of a Square Cylinder for Piezoelectric Energy Harvesting—Parametric Study Using Fluid–Structure Interaction Modeling. Energies 2020, 13, 2645.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop