不同来流角度下方形排列四圆柱的水动力特性  

A Study on Hydrodynamic Characteristics of Four Cylinders Arranged Squarely at Different Incident Angles

作　　者：王成彦 巫凯旋 陈沛楷 黄技[1] WANG Chengyan;WU Kaixuan;CHEN Peikai;HUANG Ji(Naval Architecture and Shipping College,Guangdong Ocean University,Zhanjiang 524005,China)

机构地区：[1]广东海洋大学船舶与海运学院,广东湛江524005

出　　处：《船舶与海洋工程》2023年第2期7-13,18,共8页Naval Architecture and Ocean Engineering

摘　　要：为研究不同来流角度下方形排列四圆柱的水动力特性,利用Fluent软件模拟雷诺数为3 900、来流角度不同时,临界间距比为2.0和3.5情况下的四圆柱互扰效应。通过数值模拟,重点分析来流角度发生变化引起的下游圆柱升阻力系数和尾流模态的改变,比较其在这个临界间距比下呈现出的不同特征。研究结果表明:随着来流角度的增大,在2种临界间距比下同号圆柱呈现出的阻力系数变化趋势的特点相似;2种间距比下圆柱的升力系数均表现出由离散到收敛的趋势,但具体特点有所差异;斯特鲁哈数在2种间距比下的特点存在明显不同。研究成果可供海上钻井平台等海洋结构物设计参考。In order to investigate the hydrodynamic characteristics of the four cylinders arranged squarely at different incident angles,the FLUENT software is used to simulate the mutual interference effect among the four cylinders at Reynolds number 3900 and critical distance ratios of 2.0 and 3.5 under different incident angles.In the numerical simulation,the changes of lift and drag coefficients,and the wake mode of the downstream cylinders caused by different incoming flow angles are analyzed in detail,and the characteristics corresponding to different critical distance ratios are compared.The result shows that the cylinders of same size have similar characteristics of the drag coefficient change trend when the incoming flow angles increase under both critical distance ratios.Moreover,the lift coefficients under the two distance ratios show a trend from discrete to convergent,but the specific characteristics are different.The characteristics of Strouhal numbers are also very different under the two critical distance ratios.All these have certain practical significance for the design of offshore structures such as offshore drilling platform.

关 键 词：来流角 方形排列四圆柱 水动力特性 

分 类 号：U661.3[交通运输工程—船舶及航道工程]