Abstract
As a result of continuous depletion of non-renewable energy sources, new methods of harvesting energy are being developed. A unique way of harvesting wind energy, namely Bladeless Wind Turbine (BWT) is discussed in this paper. It differs from conventional turbine by harvesting energy through Vortex Induced Vibration (VIV) which is safe and quiet in operation. It has no bearings, gears or any rotating device hence it has low maintenance cost and high life. The scope of BWT as the renewable energy source varies from offshore to wind farms considering the availability of high intensity winds. BWT is a trio of diverse engineering branches: Electrical Engineering, Fluid Dynamics and Mechanics of Solids that often makes it nonlinear as well as complex. This article includes a basis for vortex-induced vibrations, dynamic modelling, components of BWT and energy harvesting unit. Optimum shape to harvest the energy is outlined in combination with mathematical model of the turbine. Various modes to harness vibrational energy, including different orientations and surface extensions, to widen the operating range and increase performance are covered in the review. This paper is a complete outline of BWT which shows the advancement of technology from VIV to commercially available products.
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