Orientation of bluff body for designing efficient energy harvesters from vortex-induced vibrations

The characteristics and performances of four distinct vortex-induced vibrations (VIVs) piezoelectric energy harvesters are experimentally investigated and compared. The difference between these VIV energy harvesters is the installation of the cylindrical bluff body at the tip of cantilever beam with...

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Bibliographic Details
Published in:Applied physics letters 2016-02, Vol.108 (5)
Main Authors: Dai, H. L., Abdelkefi, A., Yang, Y., Wang, L.
Format: Article
Language:English
Subjects:
Applied physics
Cantilever beams
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Configurations
Cylindrical bodies
CYLINDRICAL CONFIGURATION
Damping
DESIGN
Energy harvesting
Harvesters
Horizontal orientation
ORIENTATION
PIEZOELECTRICITY
Resonant frequencies
Synchronism
SYNCHRONIZATION
VELOCITY
Vortex-induced vibrations
VORTICES
WIND
Wind speed
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Description
Summary:The characteristics and performances of four distinct vortex-induced vibrations (VIVs) piezoelectric energy harvesters are experimentally investigated and compared. The difference between these VIV energy harvesters is the installation of the cylindrical bluff body at the tip of cantilever beam with different orientations (bottom, top, horizontal, and vertical). Experiments show that the synchronization regions of the bottom, top, and horizontal configurations are almost the same at low wind speeds (around 1.5 m/s). The vertical configuration has the highest wind speed for synchronization (around 3.5 m/s) with the largest harvested power, which is explained by its highest natural frequency and the smallest coupled damping. The results lead to the conclusion that to design efficient VIV energy harvesters, the bluff body should be aligned with the beam for low wind speeds (2 m/s).
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4941546