지렛대 회전형 원형실린더 와유기진동 청정에너지 추출장치모형의 실험연구

Abstract

In order to verify the concept of VIVEED (Vortex Induced Vibration Energy Extraction Device), experimental study for vortex-induced vibration clean energy extraction device model using circular cylinder pivoted with a lever was performed. The VIVEED extracts the electric energy from fluid flow energy. The model is composed of energy extraction circular cylinder pivoted with a lever, four bar linkage, mechanical measurement parts, electric generator and resistance. Flow speed, load resistance, link length, flow direction, cylinder diameter and cross-sectional shape, number of cylinders were chosen as experiment variables. The mechanical and electrical efficiency to fluid flow power were measured as experiment performances for the range of Reynolds number, 104~105. The maximum value of average mechanical efficiency was recorded as 22.5 % for one cylinder, forward direction of flow, output link length, 325 mm, reduced velocity, 6.2 and load resistance, 30 Ω. The lock-in phenomenon was observed only at forward flow direction.