摘要
基于开源程序OpenFOAM?开发求解器,建立了波流耦合作用下高桩挡板透空式防波堤水动力特性的三维数值分析模型,模型引入了界面几何重构方法,使捕捉到的水气界面更加平滑,采用修正后的k-ω湍流模型,可有效解决长时间模拟中由于高估湍动能和涡黏系数引起的波高衰减问题。采用物理模型试验数据和文献数据验证了三维数值波流水槽的合理性。通过算例分析,研究了波流耦合作用下高桩挡板透空式防波堤结构的水动力特性。分析结果表明:单独水流作用下,高桩挡板透空式防波堤前方水位会升高,后方水位会降低;波流耦合作用下,高桩挡板透空式防波堤挡浪板下方和防波堤后方自由面附近流速明显增大,水平流速沿水深方向先增大后减小,挡浪板和胸墙附近的动水压力显著增大;波流耦合作用下结构物前后波能随波频的分布规律与波浪单独作用下相似,但透射波能量和幅值显著增大。
Based on OpenFOAM?, a 3-dimensional numerical model for the hydrodynamic characteristics of pile-supported baffle breakwater under wave-current coupling action was developed by using a newly compiled solver. An interface geometry reconstruction method was introduced to track the free surface and keep interface sharp and smooth. A modified k-ω turbulence model was adopted to solve the overestimation of turbulence kinetic energy and eddy viscosity in long-term simulation. Physical model test was carried out to validate the numerical model. The hydrodynamic characteristics of the pile-supported baffle breakwater under wave-current coupling action were studied through example analysis. Under the action of current, the water level in front of the pile-supported baffle breakwater increases and the water level behind the pile-supported baffle breakwater decreases. Under wave-current coupling action, the flow velocities below the baffle and near the free surface at the rear of the pile-supported baffle breakwater increase and the horizontal velocity increases first and then decreases along depth-direction. The dynamic pressure near the baffle and the crest wall increases significantly. The energy distribution characteristics of the waves in front of and behind the structure under the wave-current coupling action are similar to those under the wave action while the transmitted wave energy and amplitude increase.
作者
张彪
王心玉
宋军港
赵洋
刘勇
ZHANG Biao;WANG Xin-yu;SONG Jun-gang;ZHAO Yang;LIU Yong(College of Engineering,Ocean University of China,Qingdao 266100,China;Tianjin Port Engineering Design&Consulting Co.Ltd.,Tianjin 300457,China)
出处
《水道港口》
2022年第6期710-720,共11页
Journal of Waterway and Harbor
基金
国家自然科学基金项目(52101336)
山东省自然科学基金项目(ZR2021QE188)
海岸与近海工程国家重点实验室开放基金(LP2206)。
关键词
波流耦合
高桩挡板透空式防波堤
数值模拟
水动力特性
wave-current interaction
pile-supported baffle breakwater
numerical simulation
hydrodynamic characteristics
