基于Delft3D的离岸堤附近波浪与波生流数值模拟  

Numerical simulation of waves and wave-induced currents in the vicinity of a detached breakwater based on Delft3D

作　　者：许忠厚[1] 董晓红 尹亚军[1] 

机构地区：[1]河海大学港口海岸与近海工程学院海岸灾害与防护教育部重点实验室,南京210098 [2]宁波中交水运设计研究有限公司,宁波315040

出　　处：《水道港口》2016年第1期27-34,共8页Journal of Waterway and Harbor

摘　　要：基于Delft3D三维波流耦合模型,模拟了仅波浪作用下出水离岸堤附近的波浪与波生流,与物模试验资料进行了对比,结果表明,Delft3D波流耦合模型能较好模拟波浪在近岸区域的浅水变形、折射、绕射、破碎等物理现象,波高、波生流沿断面的分布与试验结果吻合良好,验证了该模型在波浪传播变形、波生流模拟的可靠性;研究了不同入射角度与不同波高时离岸堤附近波生流的形态,研究表明入射角度增大,沿岸流也随之增大,离岸堤后方环流逐渐向波浪入射方向的下游移动,不同的入射波高条件下,离岸堤附近流态并没有太大变化,波高增大主要引起流速增大。Based on 3D numerical model Delft3D,coupling wave and current,a numerical model was estab- lished to simulate the waves and currents near the offshore dyke out of water.The distribution of wave height and wave-induced current along the section are consistent with the test results of physical model,indicating that Delft3D is a reliable model to simulate the physical phenomenon of wave deformation, refraction, diffraction and breaking in shallow water area.Based on the reasonable validation of the model,the flow patterns under different angles of wave attack and different wave heights were studied.It is demonstrated when the wave angle increases,the longshore cur- rent increases accordingly and the circulation behind the breakwater moves downstream of the wave incoming direc- tion.When the wave height increases,the flow patterns does not change evidently,but the flow velocity increases ac- cordingly.

关 键 词：离岸堤 波高 波生流 环流 

分 类 号：TV143[水利工程—水力学及河流动力学] O242.1[理学—计算数学]