Electrical power generation from vortex-induced vibrations of a circular cylinder

A. K. Soti, M. C. Thompson, J. Sheridan, R. Bhardwaj

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Renewable energy sources are likely to become essential due to continuously increasing energy demands and depletion of the natural resources that are used for power generation, such as coal and gas. They are also advantageous for their reduced environmental impact. We present a numerical study on the possibility of generating electrical power from vortex-induced vibration (VIV) of a cylinder. The cylinder is free to oscillate in the direction transverse to the incoming flow. The cylinder is attached to a magnet that can move along the axis of a coil made from a conducting wire. The magnet and the coil together make a linear electrical generator. For the simulations reported here, the Reynolds number is kept at 150 so that the flow is laminar and two-dimensional (2D). The incompressible 2D Navier-Stokes equations are solved using an extensively validated spectral-element based solver. We study the effect of the electromagnetic (EM) damping constant ξm0 and coil dimensions (radius a and length L) on the electrical power extracted. We find there is an optimal value of ξm0m0,opt) at which maximum electrical power is generated. As we increase either the radius or the length of the coil, the value of ξm0,opt is observed to increase. Although the maximum average power remains the same, a larger coil radius or length results in a more favourable system which can extract a relatively large amount of power when ξm0 is far from ξm0,opt

Original languageEnglish
Title of host publicationProceedings of the 20th Australasian Fluid Mechanics Conference, AFMC 2016
PublisherAustralasian Fluid Mechanics Society
ISBN (Electronic)9781740523776
Publication statusPublished - 2016
EventAustralasian Fluid Mechanics Conference 2016 - The University of Western Australia, Perth, Australia
Duration: 5 Dec 20168 Dec 2016
Conference number: 20th


ConferenceAustralasian Fluid Mechanics Conference 2016
Abbreviated titleAFMC 2016

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