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Title: Orientation of bluff body for designing efficient energy harvesters from vortex-induced vibrations
Authors: Dai, Hu Liang
Yang, Yaowen
Abdelkefi, A.
Wang, L.
Keywords: Civil and Environmental Engineering
Issue Date: 2016
Source: Dai, H. L., Abdelkefi, A., Yang, Y., & Wang, L. (2016). Orientation of bluff body for designing efficient energy harvesters from vortex-induced vibrations. Applied Physics Letters, 108(5), 053902-.
Series/Report no.: Applied Physics Letters
Abstract: The characteristics and performances of four distinct vortex-induced vibrations (VIVs) piezoelectricenergy 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) and perpendicular to the beam at high wind speeds (>2 m/s).
ISSN: 0003-6951
DOI: 10.1063/1.4941546
Schools: School of Civil and Environmental Engineering 
Rights: © 2016 AIP Publishing LLC. This paper was published in Applied Physics Letters and is made available as an electronic reprint (preprint) with permission of AIP Publishing LLC. The published version is available at: []. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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