Prospect of Micro Power Generation Utilizing VIV in Small Stream Based on Verification Experiments of Power Generation in Water Tunnel

Journal of Fluid Science and Technology

卷:8

Mizuyasu KOIDE¹  Shuichi YAMADA²  Tsutomu TAKAHASHI²  Masataka SHIRAKASHI³  Takahiro SEKIZAKI⁴ 

[1] Department of Mechanical Engineering, Fukushima National College of Technology;

[2] Department of Mechanical Engineering, Nagaoka University of Technology;

[3] Department of Mechanical Precision Engineering, Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia;

[4] Research and Development Golf Department, YONEX CO., LTD.;

关键词: vortex;    flow induced vibration;    hydroelectric power generation;    trailing vortex;    river monitoring;    water flow;   

DOI  :  10.1299/jfst.8.294

来源: DOAJ

【 摘 要 】

The target of this research is to develop a micro electric power generator for a low cost small river monitoring device. Firstly, the power generation by vortex induced vibrations (VIVs), its performance coefficient and the optimum condition of the generator were estimated from energy balance analysis based on the assumption that VIVs can be regarded as a resonance oscillation of a linear system. Secondly, water tunnel experiments were carried out and it was confirmed that the trailing vortex induced vibration (TVIV) occurs on a cruciform circular-cylinder/strip-plate system over a velocity range about 15 times wider than that of Kármán vortex induced vibration (KVIV). Finally, power generation experiments were carried out utilizing TVIV. The generator circuit consists of coils mounted on the circular cylinder vibrated by TVIV and magnets fixed on rigid supports. The generator is shown to extract energy from the water flow in the same way as a viscous damper over the expected velocity range. Although the performance coefficient of TVIV electricity generation is lower than that of KVIV, it is more appropriate for natural rivers of which flow velocity changes greatly.

【 授权许可】

Unknown