Abstract
Hydro-VENUS (Hydrokinetic Vortex ENergy Utilization System) is a flow-induced oscillation based energy harvester using a cylindrical pendulum. The Hydro-VENUS exploiting the galloping oscillation of the pendulum with semi-elliptical cross-section is effective in harvesting energy from flowing water. This galloping excitation is found to induce not only rotational oscillation but also one-way rotation of the pendulum. In this study, the energy harvesting performances of the Hydro-VENUS using the galloping-induced oscillation and rotation are investigated through water channel experiments. Furthermore, a blade tip winglet and an elliptical curvature on the rotating pendulums are examined to improve the energy harvesting performances by suppressing the blade tip vortices.
