805 水力エネルギーによって振動する2本の片持ち円柱の最大振幅発生条件(2)(OS8-2 水力エネルギーの活用技術,OS8水力エネルギーの活用技術,オーガナイズドセッション)

概要

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It is well known that the engineering vibration problems caused by vortex street generated from body in the flow. Therefore, the studies for reducing method of fluids force were carried out. Considering the world interest to unused water resources and micro hydro-energy, it is necessary to think the vibration phenomenon by vortex streets from the point of view of clean energy from streams in river and sea. In this study, we considered whether it's possible to collect the current energy of a river and a sea using the body vibration type induced by vortex similar to wave energy collection. The experimental study was carried out using the 2 cantilever circular cylinder under lock-in condition. To get the suitable relative position for maximum oscillation, the oscillating pattern and vortex street were investigated by visualization test. From these results, the basis data concerning energy conversion from water current to body motion by use of flow-induced vibration were obtained.
2007-11-17