Enhancement of Energy Harvesting Performance by a Coupled Bluff Splitter Body and PVEH Plate through Vortex Induced Vibration near Resonance

Chin, W.K. and Ong, Z.C. and Kong, K.K. and Khoo, S.Y. and Huang, Y.H. and Chong, W.T. (2017) Enhancement of Energy Harvesting Performance by a Coupled Bluff Splitter Body and PVEH Plate through Vortex Induced Vibration near Resonance. Applied Sciences, 7 (9). p. 921. ISSN 2076-3417

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Official URL: http://dx.doi.org/10.3390/app7090921

Abstract

Inspired by vortex induced vibration energy harvesting development as a new source of renewable energy, a T-shaped design vibration energy harvester is introduced with the aim of enhancing its performance through vortex induced vibration at near resonance conditions. The T-shaped structural model designed consists of a fixed boundary aluminum bluff splitter body coupled with a cantilever piezoelectric vibration energy harvesters (PVEH) plate model which is a piezoelectric bimorph plate made of a brass plate sandwiched between 2 lead zirconate titanate (PZT) plates. A 3-dimensional Fluid-Structure Interaction simulation analysis is carried out with Reynolds Stress Turbulence Model under wind speed of 7, 10, 12, 14, 16, 18, 19, 20, 22.5, and 25 m/s. The results showed that with 19 m/s wind speed, the model generates 75.758 Hz of vortex frequency near to the structural model's natural frequency of 76.9 Hz. Resonance lock-in therefore occurred, generating a maximum displacement amplitude of 2.09 mm or a 49.76% increment relatively in vibrational amplitude. Under the effect of resonance at the PVEH plate's fundamental natural frequency, it is able to generate the largest normalized power of 13.44 mW/cm3g2.

Item Type: Article
Uncontrolled Keywords: Vortex induced vibration; Vibrational energy harvesting; Forced wind; Piezoelectric plate system
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 12 Sep 2018 03:50
Last Modified: 12 Sep 2018 03:50
URI: http://eprints.um.edu.my/id/eprint/19206

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