摘要
针对单固定直立圆柱的波浪爬升问题,本文采用势粘流单向耦合技术对波浪爬升过程中波面高度与圆柱水平、垂向波浪力进行了数值预报。采用STAR-CCM+求解器对数值结果进行了网格收敛性分析,研究了圆柱壁面附近的网格参数。通过比较不同波陡波浪下的波浪爬升高度,一、二阶波面在圆柱周围的空间分布,以及流场绕射演化过程图,分析了非线性波浪绕射的特征;比较了不同波况下波浪爬升过程中圆柱体受力。结果表明:在波陡为1/10的强非线工况下迎浪位置的波面最大值可达到2倍的波幅。短波下圆柱周围波面的二阶效应明显,而长波下二阶量接近于零。本文采用的势粘流单向耦合方法对于波面和波浪力的预报结果与试验吻合良好,并且计算所需要的网格数要小于计算流体力学方法。
To study the wave run-up problems of a fixed vertical cylinder with different incident waves,the potential and viscous flow single-direction coupling technique was used to predict the wave surface height and horizontal and vertical wave forces in the process of wave run-up.The mesh convergence analysis was performed using the STAR-CCM+solver to study the grid parameters around the column wall.The characteristics of nonlinear wave diffraction were analyzed by comparing the wave climbing height under different wave steepnesses and the spatial distributions of the first-and second-order wave elevation harmonics around the cylinder,as well as the evolution process of wave diffraction patterns.At the same time,the forces acting on the cylinder during the wave run-up under different wave conditions were also compared.The results show that under the strong nonlinear conditions where the wave steepness was 1/10,the maximum wave surface elevation at the heading position could reach twice the amplitude.Under the short waves,the second-order effect of the wave elevation around the cylinder was obvious,while the second-order quantity was close to zero under the long waves.The results of the potential and viscous flow single-direction coupling method used in this study agree well with experimental results in the prediction of wave surface and wave forces,and the method needs fewer mesh cells compared with the computational fluid dynamics(CFD)method.
作者
赵彬彬
陈永博
段文洋
ZHAO Binbin;CHEN Yongbo;DUAN Wenyang(College of Shipbuilding Engineering,Harbin Engineering University,Harbin 150001,China)
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2019年第7期1208-1216,共9页
Journal of Harbin Engineering University
基金
国家自然科学基金项目(51679043)
关键词
波浪爬升
固定直立圆柱
势粘流单向耦合技术
非线性波浪
STAR-CCM+
谐波分析
wave run-up
fixed vertical cylinder
potential and viscous flow single-direction coupling technique
nonlinear waves
STAR-CCM+
harmonic analysis
