Wave Energy Extraction by Flexible Floaters
Wave Energy Extraction by Flexible Floaters
复制标题
通过柔性浮子提取波浪能
作者：
S. Michele;Federica Buriani;E. Renzi;M. van Rooij;B. Jayawardhana;A. Vakis
我们提出了一种新颖的数学模型来研究柔性浮子提取波浪能。该模型基于干模态方法，并结合匹配的本征函数展开。我们的模型结果与格罗宁根大学开发的演示设备获得的初步数据令人满意。我们表明，弹性的作用是增加相对于刚体的谐振频率的数量，这对波浪功率输出有积极的影响。然后将数学模型扩展到由 JONSWAP 谱描述的不规则入射波。我们的结果表明，与单色情况相比，不规则波的峰值捕获因子降低。然而，系统在非谐振频率下变得更加高效。这项工作强调了扩大柔性波浪能转换器实验研究的必要性，与刚性转换器相比，柔性波浪能转换器仍然只占少数。
We present a novel mathematical model to investigate the extraction of wave power by flexible floaters. The model is based on the method of dry modes, coupled with a matched eigenfunction expansion. Our model results compare satisfactorily with preliminary data obtained from a demonstrator device, developed at the University of Groningen. We show that the role of elasticity is to increase the number of resonant frequencies with respect to a rigid body, which has a positive effect on wave power output. The mathematical model is then extended to irregular incident waves, described by a JONSWAP spectrum. Our results show that the peak capture factors decrease in irregular waves, as compared to the monochromatic case. However, the system becomes more efficient at non-resonant frequencies. This work highlights the need to scale-up experimental investigations on flexible wave energy converters, which are still a small minority, compared to those on rigid converters.