波浪与反弧面直墙防波堤相互作用的砰击载荷数值预报研究  

Numerical Prediction of Wave Impact on Vertical Wall Attached with Recurved Parapet

作　　者：薛瑛杰 赵伟文 万德成[1] XUE Yingjie;ZHAO Weiwen;WAN Decheng(Computational Marine Hydrodynamics Lab(CMHL),School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学船海计算水动力学研究中心(CMHL)船舶海洋与建筑工程学院,上海200240

出　　处：《中国造船》2024年第1期223-236,共14页Shipbuilding of China

基　　金：国家重点研发计划项目(2022YFC2806705);国家自然科学基金项目(51879159,52131102)。

摘　　要：采用基于开源平台Open FOAM开发的CFD求解器naoe-FOAM-SJTU,对实尺度下波浪与反弧面直墙防波堤相互作用开展了数值研究。采用主动造波-消波方法生成不规则波,采用基于分段线性界面模型的几何流体体积法捕捉自由面。数值模拟时在距造波点不同位置处设置了波高测点,在防波堤表面布置了多个压力测点,并将各测点得到的波高及砰击压力时历数据与试验进行对比。研究表明,受入射波、反射波和空气涡流场的影响,靠近防波堤位置处的波面线将会形成两个明显的峰区。在砰击发生后,防波堤表面的砰击压力将随流体运动向顶部与底部转移,在圆弧段顶部产生高频压力振荡。同时发现防波堤顶端的反弧墙将上涌流体转化为水平射流,极大地改变了气相涡量场结构,能缓解溢流问题。In this paper,the interaction between the full-scale breaking wave and vertical wall attached to the recurved parapet is numerically investigated using the in-house computational fluid dynamics(CFD)solver naoe-FOAM-SJTU,which is developed based on the OpenFOAM framework.The irregular waves are generated by utilizing the generating-absorbing boundary condition,and the free surface is captured by the volume of fluid method(VOF)based on the piecewise linear interface calculation method.Wave probes are set up at different locations before the wall and pressure probes are placed on the wall surface.The predicted wave elevation and surface pressure are compared with experimental data.The results show that,induced by the incident waves,reflected waves,and air vortex field,there will be two distinct peak areas formed on the free surface near the seawall.Besides,following fluid flow,the impact pressure on the seawall will transfer towards the top and the bottom,leading to high-frequency pressure oscillations at the top of the recurved parapet.It is observed that the recurved parapet section could mitigate overflow issues by transforming upwelling fluid into horizontal jet flows,thus significantly altering the structure of the gas-phase vorticity field.

关 键 词：反弧面直墙防波堤 砰击载荷 几何流体体积法 破碎波 

分 类 号：U661.1[交通运输工程—船舶及航道工程]