Modeling of Vortex Induced Vibration based Hydrokinetic Energy Converter

Abstract

Vortex Induced Vibrations (VIV) forms the basis of the hydrokinetic energy converter. With the increasing energy demand, there is a need for a significant shift to using clean and renewable sources of energy. VIV based hydrokinetic energy converter aims to harness aquatic energy from slow moving water currents. For modeling, a single cylinder system with single degree-of-freedom is considered. This paper deals with formulation of generalized equations to characterize the flow oscillator interaction and to develop a model to carry out experimental observations of the hydrokinetic energy converter. The model will help predict the dynamic response and ultimately determine the power that can be extracted. The kinetic energy of the fluid flow produces transverse mechanical motion of the bluff body. This mechanical motion is then used to produce useful electrical energy with the help of a Power Take Off (PTO) system. The theoretical maximum energy that can be harnessed by the PTO has also been discussed.