幕墙式防波堤水动力特性的数值模拟研究  

Numerical analysis on the hydrodynamic characteristics of a curtain breakwater using openfoam

作　　者：尹胜强 刘勇[1] 王心玉[1] YIN Sheng-qiang;LIU Yong;WANG Xin-yu(Ocean University of China,Coastal and Ocean Engineering Research Institute,Qingdao 266100,China)

机构地区：[1]中国海洋大学海岸与海洋工程研究所

出　　处：《水道港口》2019年第5期547-555,共9页Journal of Waterway and Harbor

基　　金：国家自然科学基金项目(51725903)

摘　　要：基于CFD开源程序库OpenFOAM,采用不可压缩粘性两相流模型,以VOF方法捕捉自由面,利用速度入口边界造波法造波,通过添加松弛因子的方式消波,建立二维数值波浪水槽,模拟分析幕墙式防波堤的水动力特性。利用物理模型试验数据,验证数值模拟结果的可靠性。数值算例表明:当消浪室相对宽度为0.08~0.10,下垂板相对吃水深度为0.09~0.12时,幕墙式防波堤消浪效果最好;下垂板底角的方向对消浪效果影响较小,但对下垂板受力影响较大,综合考虑消浪效果与波浪力,推荐下垂板底角位于右下端;下垂板周围存在明显的涡旋,能够有效耗散入射波能量。文章所建立的二维数值模型可以有效模拟波浪与幕墙式防波堤的相互作用,为工程优化设计提供科学指导。A two-dimensional numerical investigation on the hydrodynamic performance of a curtain breakwater was presented in this paper.A numerical wave flume was developed based on the incompressible viscous two-phase flow model where the VOF method was used to track the free surface.Relaxation zone technique was used to implement the generation and absorption of waves.The two-dimensional numerical model was validated by comparing the numerical results with the physical model experimental data.The variations of hydrodynamic quantities versus influencing factors including the wavelength,the wave chamber width,the immersed depth of the drooping plate and the angle at the bottom of the drooping plate were clarified.It is found that for reaching lower reflection,the values of relative width of the wave chamber are recommended between 0.08 to 0.10 with the relative immersed depth of the drooping plate ranging from 0.09 to 0.12;The angle direction of the drooping plate bottom has little effect on the reflection coefficient,while it has a great influence on the force of the drooping plate.The incident wave energy is effectively dissipated by the vortex flows around the bottom of drooping plate.The present numerical wave flume can well estimate the hydrodynamic performance of the curtain breakwater for practical application.

关 键 词：数值模拟 幕墙式防波堤 水动力特性 OPENFOAM 

分 类 号：U65[交通运输工程—港口、海岸及近海工程] TV143[交通运输工程—船舶与海洋工程]