NDLI: Wake of a cylinder: a paradigm for energy harvesting with piezoelectric materials

Content Provider	Springer Nature Link
Author	Akaydın, H. D. Elvin, N. Andreopoulos, Y.
Copyright Year	2010
Abstract	Short-length piezoelectric beams were placed in the wake of a circular cylinder at high Reynolds numbers to evaluate their performance as energy generators. The coherent vortical structures present in this flow generate a periodic forcing on the beam which when tuned to its resonant frequency produces maximum output voltage. There are two mechanisms that contribute to the driving forcing of the beam. The first mechanism is the impingement of induced flow by the passing vortices on one side of the beam, and the second is the low pressure core region of the vortices which is present at the opposite side of the beam. The sequence of these two mechanisms combined with the resonating conditions of the beam generated maximum energy output which was also found to vary with the location in the wake. The maximum power output was measured when the tip of the beam is about two diameters downstream of the cylinder. This power drops off the center line of the wake and decays with downstream distance as (x/D)−3/2.
Starting Page	291
Ending Page	304
Page Count	14
File Format	PDF
ISSN	07234864
Journal	Experiments in Fluids
Volume Number	49
Issue Number	1
e-ISSN	14321114
Language	English
Publisher	Springer-Verlag
Publisher Date	2010-04-08
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Engineering Thermodynamics, Heat and Mass Transfer Fluid- and Aerodynamics Engineering Fluid Dynamics
Content Type	Text
Resource Type	Article
Subject	Fluid Flow and Transfer Processes Physics and Astronomy Mechanics of Materials Computational Mechanics

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