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首页> 外文期刊>Ocean Engineering >Hydrodynamic performance of a novel oscillating-water-column breakwater with a horizontal bottom-plate: Experimental and numerical study
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Hydrodynamic performance of a novel oscillating-water-column breakwater with a horizontal bottom-plate: Experimental and numerical study

机译：具有水平底板的新型振荡水柱防波堤的水动力性能：实验和数值研究

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摘要

In this study, the hydrodynamic characteristics of a novel oscillating water column (OWC) breakwater with a horizontal bottom-plate is numerically and experimentally investigated. A viscous fully nonlinear numerical wave tank (NWT) solved by the open source package OpenFOAM is established under laminar flow conditions. After comparing the numerical results with the experimental ones, the well-validated numerical model is further employed to investigate the effects of the length of horizontal bottom-plate (D), the immersion depth of back-plate (d(2)), the water depth (h) and the wave height (H) on the reflection (C-r) and transmission (C-t) coefficients, dissipation coefficient (C-d) and column-confined energy coefficient (C-e) of the breakwater. The results show that lengthening the bottom-plate can effectively increase the energy dissipation and then lead to lower reflection and transmission coefficients, and a smaller draught of the back-plate can also increase energy dissipation. The water depth has insignificant influence on the hydrodynamic coefficient of long waves, but influences the breakwater performance in short waves. The variation of wave height mainly contributes to the change of reflection coefficient.
机译：在这项研究中，对具有水平底板的新型振荡水柱（OWC）防波堤的水动力特性进行了数值和实验研究。在层流条件下，建立了由开源软件包OpenFOAM解决的粘性全非线性数值波箱（NWT）。在将数值结果与实验结果进行比较之后，进一步采用经过充分验证的数值模型来研究水平底板长度（D），背板的浸入深度（d（2）），以及水深（h）和波高（H）对防波堤的反射系数（Cr）和透射系数（Ct），耗散系数（Cd）和柱约束能量系数（Ce）。结果表明，加长底板可以有效地增加能量的消耗，从而导致较低的反射和透射系数，而较小的背板吃水也可以增加能量的消耗。水深对长波的水动力系数影响不大，但会影响短波的防波堤性能。波高的变化主要是导致反射系数的变化。

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