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.
References
1.
A.
Abdelkefi
, Int. J. Eng. Sci.
100
, 112
(2016
).2.
D.
Li
, Y.
Wu
, A.
Ronch
, and J.
Xiang
, Prog. Aerosp. Sci.
86
, 28
(2016
).3.
E.
Naudascher
and D.
Rockwell
, Flow-Induced Vibrations: An Engineering Guide
(Courier Corporation
, 2012
).4.
Z.
Peng
and Q.
Zhu
, Phys. Fluids
21
, 123602
(2009
).5.
Q.
Zhu
and Z.
Peng
, Phys. Fluids
21
, 033601
(2009
).6.
J.
McCarthy
, S.
Watkins
, A.
Deivasigamani
, and S.
John
, J. Sound Vib.
361
, 355
(2016
).7.
J.
Young
, J. C.
Lai
, and M. F.
Platzer
, Prog. Aerosp. Sci.
67
, 2
(2014
).8.
Q.
Xiao
and Q.
Zhu
, J. Fluids Struct.
46
, 174
(2014
).9.
J.
Allen
and A.
Smits
, J. Fluids Struct.
15
, 629
(2001
).10.
H.
Akaydin
, N.
Elvin
, and Y.
Andreopoulos
, Exp. Fluids
49
, 291
(2010
).11.
S.
Shi
, T.
New
, and Y.
Liu
, Exp. Therm. Fluid Sci.
46
, 151
(2013
).12.
R. D.
Blevins
, Flow-Induced Vibration
(Van Nostrand Reinhold Co., Inc
., New York, NY, USA
, 1990
).13.
A.
Roshko
, “On the drag and shedding frequency of two-dimensional bluff bodies
,” Technical Report No. NACA-TN-3169
, DTIC Document, 1954
.14.
J.
Gerrard
, J. Fluid Mech.
25
, 401
(1966
).15.
L.
Zhang
, H.
Dai
, A.
Abdelkefi
, and L.
Wang
, Appl. Phys. Lett.
111
, 073904
(2017
).16.
Y.
Lau
, R.
So
, and R.
Leung
, J. Fluids Struct.
19
, 1061
(2004
).17.
H.
Akaydin
, N.
Elvin
, and Y.
Andreopoulos
, Smart Mater. Struct.
21
, 025007
(2012
).18.
C.
Michler
, S.
Hulshoff
, E.
Van Brummelen
, and R.
De Borst
, Comput. Fluids
33
, 839
(2004
).19.
Z.
Tukovic
, P.
Cardiff
, A.
Karac
, H.
Jasak
, and A.
Ivankovic
, in 9th OpenFOAM Workshop
, Zagreb, Croatia
(2014
).20.
C.
Bose
, S. K.
Kumar
, S.
Sarkar
, and S.
Gupta
, in Proceedings of the Structural Engineering Convention, 2016
.21.
M.
Unal
and D.
Rockwell
, J. Fluid Mech.
190
, 491
(1988
).22.
Y.
Nakamura
, J. Fluids Struct.
10
, 147
(1996
).© 2017 Author(s).
2017
Author(s)
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