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Title: 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 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)
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [1]
  1. Department of Mechanics, Huazhong University of Science and Technology, Wuhan 430074 (China)
  2. (Singapore)
  3. Department of Mechanical and Aerospace Engineering, New Mexico State University, Las Cruces, New Mexico 88003 (United States)
  4. School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798 (Singapore)
Publication Date:
OSTI Identifier:
22489428
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 108; Journal Issue: 5; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CYLINDRICAL CONFIGURATION; DESIGN; ORIENTATION; PERFORMANCE; PIEZOELECTRICITY; SYNCHRONIZATION; VELOCITY; VORTICES; WIND