Fluidic energy harvesting beams in grid turbulence

Amir Hossein Danesh Yazdi, O. Goushcha, N. Elvin, Y. Andreopoulos

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Much of the recent research involving fluidic energy harvesters based on piezoelectricity has focused on excitation through vortex-induced vibration while turbulence-induced excitation has attracted very little attention, and virtually no previous work exists on excitation due to grid-generated turbulence. The present experiments involve placing several piezoelectric cantilever beams of various dimensions and properties in flows where turbulence is generated by passive, active, or semi-passive grids, the latter having a novel design that significantly improves turbulence generation compared to the passive grid and is much less complex than the active grid. We experimentally show for the first time that the average power harvested by a piezoelectric cantilever beam placed in decaying isotropic, homogeneous turbulence depends on mean velocity, velocity and length scales of turbulence as well as the electromechanical properties of the beam. The output power can be modeled as a power law with respect to the distance of the beam from the grid. Furthermore, we show that the rate of decay of this power law closely follows the rate of decay of the turbulent kinetic energy. We also introduce a forcing function used to model approximately the turbulent eddies moving over the cantilever beam and observe that the feedback from the beam motion onto the flow is virtually negligible for most of the cases considered, indicating an effectively one-way interaction for small-velocity fluctuations.

Original languageEnglish (US)
Article number161
JournalExperiments in Fluids
Volume56
Issue number8
DOIs
StatePublished - Aug 1 2015

Fingerprint

Energy harvesting
fluidics
Fluidics
Turbulence
turbulence
grids
cantilever beams
Cantilever beams
energy
vortices
excitation
homogeneous turbulence
piezoelectricity
decay
Harvesters
Piezoelectricity
Kinetic energy
kinetic energy
Vortex flow
vibration

All Science Journal Classification (ASJC) codes

  • Computational Mechanics
  • Mechanics of Materials
  • Physics and Astronomy(all)
  • Fluid Flow and Transfer Processes

Cite this

Danesh Yazdi, A. H., Goushcha, O., Elvin, N., & Andreopoulos, Y. (2015). Fluidic energy harvesting beams in grid turbulence. Experiments in Fluids, 56(8), [161]. https://doi.org/10.1007/s00348-015-2027-2
Danesh Yazdi, Amir Hossein ; Goushcha, O. ; Elvin, N. ; Andreopoulos, Y. / Fluidic energy harvesting beams in grid turbulence. In: Experiments in Fluids. 2015 ; Vol. 56, No. 8.
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Danesh Yazdi, AH, Goushcha, O, Elvin, N & Andreopoulos, Y 2015, 'Fluidic energy harvesting beams in grid turbulence', Experiments in Fluids, vol. 56, no. 8, 161. https://doi.org/10.1007/s00348-015-2027-2

Fluidic energy harvesting beams in grid turbulence. / Danesh Yazdi, Amir Hossein; Goushcha, O.; Elvin, N.; Andreopoulos, Y.

In: Experiments in Fluids, Vol. 56, No. 8, 161, 01.08.2015.

Research output: Contribution to journalArticle

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Danesh Yazdi AH, Goushcha O, Elvin N, Andreopoulos Y. Fluidic energy harvesting beams in grid turbulence. Experiments in Fluids. 2015 Aug 1;56(8). 161. https://doi.org/10.1007/s00348-015-2027-2