Abstract
Flow-induced vibration of an inverted pendulum is investigated through circulating water channel experiment to develop the hydrokinetic power generation based on the flow-induced vibration. The main body of the inverted pendulum is an air-filled hollow circular cylinder, and the buoyant force acts on the cylindrical body as the restoring force in the water. This buoyant force sustains the pendulum vibration without any spring system. The flow-induced vibration of the inverted pendulum can extract 76% of the hydrokinetic energy incoming to the projected area of the circular cylinder normal to the water flow. This high energy harvesting efficiency is caused by the large torque obtained from the rotational vibration of the elongate inverted pendulum.
