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Micromachines 2017, 8(7), 227; doi:10.3390/mi8070227

Karman Vortex Creation Using Cylinder for Flutter Energy Harvester Device

1
Department of Mechanical and Materials Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia (UKM), 43600 UKM Bangi, Selangor, Malaysia
2
Directorate General of Electrical Transmission Projects (ETP), Ministry of Electricity, Baghdad 10001, Iraq
3
Department of Electrical, Electronic, and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia (UKM), 43600 UKM Bangi, Selangor, Malaysia
4
Institute of Sustainable Energy, Universiti Tenaga Nasional (UNITEN), Jalan IKRAM-UNITEN, 43000 Kajang, Selangor, Malaysia
*
Author to whom correspondence should be addressed.
Received: 24 March 2017 / Revised: 10 June 2017 / Accepted: 12 June 2017 / Published: 21 July 2017
(This article belongs to the Special Issue MEMS Energy Harvesters)
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Abstract

This study presents the creation of a Karman vortex for a fluttering electromagnetic energy harvester device using a cylinder. The effects of two parameters, which are the diameter and the position of the cylinder, were investigated on the Karman vortex profile and the amplitude of the fluttering belt, respectively. A simulation was conducted to determine the effect of the creation of the Karman vortex, and an experiment was performed to identify influence of the position of the cylinder on the fluttering belt amplitude. The results demonstrated that vortex-induced vibration occurred at the frequency of the first natural mode for the belt at 3 cm and 10 cm for the diameter and position of the cylinder, respectively. Under such configuration, an electromagnetic energy harvester was attached and vibrated via the fluttering belt inside the turbulent boundary layers. This vibration provides a measured output voltage and can be used in wireless sensors. View Full-Text
Keywords: aerodynamic flutter; airflow energy harvesting; flow over a bluff body; Karman vortex; wind energy aerodynamic flutter; airflow energy harvesting; flow over a bluff body; Karman vortex; wind energy
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MDPI and ACS Style

Atrah, A.B.; Ab-Rahman, M.S.; Salleh, H.; Nuawi, M.Z.; Mohd Nor, M.J.; Jamaludin, N.B. Karman Vortex Creation Using Cylinder for Flutter Energy Harvester Device. Micromachines 2017, 8, 227.

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