《厦门大学学报（自然科学版）》

为探讨一种弧板式透空堤的水动力特性,基于OpenFOAM建立了波浪与弧板式透空堤相互作用数值模型,探讨了弧板式透空堤的消浪特性、压强特性及流场分布情况.结果表明:本次数值试验范围内,波浪对弧板式透空堤的透射系数随相对板宽的增大而减小,反射系数则相反.弧板式透空堤上下表面所受波浪正压强与负压强分布呈现对称特性,且大部分工况下的波浪压强极值发生在结构物偏迎浪向一侧的测点位置处.弧板式透空堤位于静水面及以上时,消浪效果明显优于其位于静水面以下.弧板式透空堤对其周围流场影响显著,在其迎浪向与背浪向位置均产生较为明显的漩涡.

In order to study the hydrodynamic characteristics of an arc-plate open type breakwater,a numerical model of the interaction between wave and arc-plate open breakwater is established based on OpenFOAM.The wave dissipation characteristics,stress characteristics and flow field distribution of the arc-plate open breakwater are discussed.The results show that the transmission coefficient decreases with the increase of the relative plate width,while the reflection coefficient shows the opposite pattern.The distribution of positive and negative wave pressures on the upper and lower surfaces of the arc-plate open breakwater is symmetrical,and the extreme wave pressures occur at the measurement points on the side of the structure facing the waves in most cases.The wave dissipation effect of the arc-plate open type breakwater is better than that of the one below the still water surface.The arc-plate open type breakwater has a significant influence on the flow field around it,and produces obvious eddies in both the front and the back-wave directions.

引言
1 数值模型建立
2 数值模型验证
3 水动力特性分析
4 结论

图1 空水槽数值模型<br/>Fig.1 Numerical model of empty flume

图1 空水槽数值模型
Fig.1 Numerical model of empty flume

表1 不同疏密程度的网格参数<br/>Tab.1 Mesh parameters of different density grid

表1 不同疏密程度的网格参数
Tab.1 Mesh parameters of different density grid

图2 不同网格尺度所计算的波面历时曲线比较<br/>Fig.2 Comparison of wave surface duration curves calculated at different mesh scale

图2 不同网格尺度所计算的波面历时曲线比较
Fig.2 Comparison of wave surface duration curves calculated at different mesh scale

图3 Stokes与OpenFOAM方法计算得到的波面历时曲线<br/>Fig.3 Wave surface duration curves calculated by stokes and OpenFOAM

图3 Stokes与OpenFOAM方法计算得到的波面历时曲线
Fig.3 Wave surface duration curves calculated by stokes and OpenFOAM

图4 弧板式透空堤结构(a)和局部网格剖分(b)<br/>Fig.4 Sturcture(a)and partial meshing(b)of arc-plate type open breakwater

图4 弧板式透空堤结构(a)和局部网格剖分(b)
Fig.4 Sturcture(a)and partial meshing(b)of arc-plate type open breakwater

图7 弧板式透空堤透射系数随相对板宽变化<br/>Fig.7 Variation of Kt with the relative plate width for the arc-plate type open breakwater水

图7 弧板式透空堤透射系数随相对板宽变化
Fig.7 Variation of Kt with the relative plate width for the arc-plate type open breakwater水

图5 弧板式透空堤数值模型<br/>Fig.5 Numerical model of arc-plate type open breakwater

图5 弧板式透空堤数值模型
Fig.5 Numerical model of arc-plate type open breakwater

图6 弧板透空堤表面压力测点布设位置<br/>Fig.6 Pressure transducers on the surface of arc-plate type open breakwater

图6 弧板透空堤表面压力测点布设位置
Fig.6 Pressure transducers on the surface of arc-plate type open breakwater

图8 弧板式透空堤反射系数随相对板宽变化<br/>Fig.8 Variation of Kr with the relative plate width for the arc-plate type open breakwater

图8 弧板式透空堤反射系数随相对板宽变化
Fig.8 Variation of Kr with the relative plate width for the arc-plate type open breakwater

图9 弧板式透空堤各测点压强历时曲线(T=1.2 s,H/h=0.10,d/h=0)<br/>Fig.9 Pressure duration curve of each measuring point of the arc-plate type open breakwater(T=1.2 s,H/h=0.10,d/h=0)

图9 弧板式透空堤各测点压强历时曲线(T=1.2 s,H/h=0.10,d/h=0)
Fig.9 Pressure duration curve of each measuring point of the arc-plate type open breakwater(T=1.2 s,H/h=0.10,d/h=0)

图10 弧板式透空堤压强包络图(T=1.2 s,H/h=0.10)<br/>Fig.10 Wave pressure envelope diagram for the arc-plate type open breakwater(T=1.2 s,H/h=0.10)

图10 弧板式透空堤压强包络图(T=1.2 s,H/h=0.10)
Fig.10 Wave pressure envelope diagram for the arc-plate type open breakwater(T=1.2 s,H/h=0.10)

图11 弧板式透空堤一个周期内流场变化(T=1.2 s,H/h=0.10,d/h=0)<br/>Fig.11 Flow field changes of the arc-plate type open breakwater over a period(T=1.2 s,H/h=0.10,d/h=0)

图11 弧板式透空堤一个周期内流场变化(T=1.2 s,H/h=0.10,d/h=0)
Fig.11 Flow field changes of the arc-plate type open breakwater over a period(T=1.2 s,H/h=0.10,d/h=0)

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备注

引言

1 数值模型建立

2 数值模型验证

3 水动力特性分析

4 结论

学报简介

备注

引言

1 数值模型建立

2 数值模型验证

3 水动力特性分析

4 结 论

学报简介

4 结论