Potential application of submerged horizontal plate as a wave energy breakwater: A 2D study using the WCSPH method
Potential application of submerged horizontal plate as a wave energy breakwater: A 2D study using the WCSPH method
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水下水平板作为波浪能防波堤的潜在应用：使用 WCSPH 方法的二维研究
DOI：
10.1016/j.oceaneng.2019.05.034
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发表时间：
2019
影响因子：
5
通讯作者：
Wang Hongshu
中科院分区：
文献类型：
--
作者：
He Ming;Gao Xifeng;Xu Wanhai;Ren Bing;Wang Hongshu
水下水平板作为一种开放式防波堤已经得到了广泛的研究，一些研究探索了它作为波浪能转换器的潜力。然而，在文献中很少将这两种功能结合起来。本文采用弱可压缩光滑粒子流体力学（WCSPH）方法，建立了求解波浪- shp相互作用的二维数值模型。通过溃坝冲击实例验证了薄壁边界条件。通过与已有的孤立波和规则波与SHPs相互作用实验的比较，验证了波浪剖面和流速计算的准确性。通过对水下台阶和单轴动力源的波动力和流动力进行比较，分析了单轴动力源的优缺点。在此基础上，对规则波与固定SHP相互作用进行了参数化研究。利用Levenberg-Marquardt算法对数值结果进行回归，得到了透射波系数和能量转换效率的经验公式。最后，建立了一个关于SHP组合功能的数学规划问题。采用复合方法，求解了在规则波衰减和能量利用的不同侧重点下，SHP的最佳长度和淹没度。结果初步证明了SHP作为波浪能防波堤的潜在应用前景，并为其参数设计提供了参考，尽管本工作是二维的，忽略了能量转换器和桩对波浪和流型的影响。
The submerged horizontal plate (SHP) has been extensively studied as an open-type breakwater, and some research explored its potential as a wave energy converter. However, these two functionalities were seldom combined in the literature. In this study, a 2D numerical model solving the wave-SHP interaction was built by using the weakly compressible smoothed particle hydrodynamics (WCSPH) method. The thin-walled boundary condition was verified through a dam-break impact case. The accuracy of wave profile and flow velocity calculations was validated by comparing with available experiments of solitary and regular waves interactions with SHPs. Comparison of the wave dynamic and flow dynamic between SHP and submerged step were made, which showed the advantages and disadvantages of the SHP. Then a parametric study of regular waves-fixed SHP interaction was conducted. Empirical formulas for the wave transmission coefficient and energy conversion efficiency were obtained by regressing numerical results using the Levenberg-Marquardt algorithm. Finally, a mathematical programming problem concerning the combined functionalities of SHP was established. Using the complex method, the optimal length and submergence of SHP regarding different emphases taken on the regular wave attenuation and energy utilization were solved. The results preliminarily demonstrated the potential application of SHP as a wave energy breakwater and provided reference on its parameter design, although this work was carried out in 2D and ignored the effects of energy convertor and piles on wave and flow patterns.