波能装置与浮式防波堤集成系统的水动力性能

Hydrodynamic performance of integrated system composed of wave energy converter and floating breakwater

为了研究波能装置与防波堤集成系统的发电与防波性能,使用粘性计算流体动力学软件Star-CCM+建立了二维数值波浪水槽模型。对比方箱在水槽中垂荡运动的实验结果,验证了数值模型,使用该模型研究了动力输出装置的阻尼为最优的情况下,方箱形、Berkeley-Wedge形、三角形和三角加挡板形4种不同底部形状对浮子防波性能和发电性能的影响。结果表明:浮子形状不对称的集成装置的防波和发电性能都要优于浮子形状对称的集成装置;三角加挡板形浮子的性能优越,具有成为理想的海岸保护与波能转换装置的巨大潜力。

To investigate the wave extraction and wave attenuation performances of an integrated system of a wave energy converter(WEC)and a floating breakwater,a two-dimensional numerical wave tank model is established using Star-CCM+commercial software based on viscous computational fluid dynamics(CFD)theory.The numerical model is verified by a comparison with the published experimental result of a box heaving in a flume.The effects of the floater shape on the wave attenuation and energy extraction performance of the integrated system are studied under the optimal power take-off(PTO)damping,considering the following shapes:square,Berkley Wedge,and triangular bottoms(with and without a baffle plate).The results show that the wave attenuation and energy extraction performances of the integrated system with an asymmetric floater are better than those of the integrated device with a symmetric floater.The triangular-baffle type floater has great potential to be an ideal coastal protection and wave energy conversion structure with superior performance.