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| An experimental study on flow-induced vibration of the VIVACE converter for harnessing ocean flow energy beneath a free surface |
| XU Wanhai1, LUO Hao1, SUN Hai2 |
1.State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin, 300072, China;
2. Department Naval Architecture and Marine Engineering, Harbin Engineering University, Harbin, 150001, China |
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Abstract In this paper,a series of experimental studies on FIV of single cylinder with low mass ratio and large Reynolds number were carried out in a low turbulence free surface water channel.Cylinder response was measured by a virtual spring-damping system (Vck).It can be found that a single cylinder near free surface with Passive Turbulence Control (PTC) generally behaves three typical response types,i.e.vortex-induced vibration (VIV),transition region and galloping.The influence of the free surface is not obvious when the cylinder responds as VIV.In addition,significant effect of the free surface can be observed when the cylinder vibrates as galloping.The experimental results can provide strong support for the application of VIVACE (VIV for Aquatic Clean Energy Converter) which is one efficient device for extracting clean and renewable hydrokinetic energy from ocean flow.
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Received: 09 August 2017
Published: 15 February 2019
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