基于雷诺平均法的四圆柱桩绕流数值模拟研究  

Numerical simulation of flow around four cylinder pile based on Reynolds averaging method

作　　者：殷新锋 杨鑫 何博文[2] 黄胄 YIN Xinfeng;YANG Xin;HE Bowen;HUANG Zhou(School of Civil Engineering,Changsha University of Science and Technology,Changsha 410114,China;CCCC Second Highway Consultants Co.,Ltd.,Wuhan 430056,China)

机构地区：[1]长沙理工大学土木工程学院,湖南长沙410114 [2]中交第二公路勘察设计研究院有限公司,湖北武汉430056

出　　处：《合肥工业大学学报（自然科学版）》2024年第9期1268-1274,共7页Journal of Hefei University of Technology：Natural Science

基　　金：国家自然科学基金资助项目(52078057)。

摘　　要：为研究河海深水中水流对桥梁桩基础的动力学作用。文章基于ANSYS/FLUENT数值仿真软件,采用雷诺平均法研究四圆柱桩的绕流特征,分析7种不同迎流角及3种典型间距比下的四圆柱桩流场特征、各桩阻力系数及桩周床面所受切应力的分布。结果表明:迎流角与间距比均对四圆柱桩绕流特性有较强的影响;随迎流角从0°增大到45°,下游桩周床面切应力分布模式由屏蔽状态逐渐转变为分离流冲击状态;当间距比为1.0时,临界屏蔽角为5°;当间距比为1.5或2.0时,迎流角处在20°~30°之间,各桩阻力系数值均处于1.0±0.2范围,此时屏蔽效应最小。In order to study the dynamic effects of water flow on bridge pile foundation in deep water,this paper analyzed the flow characteristics of four cylinder pile by using the Reynolds averaging method based on the ANSYS/FLUENT numerical simulation software,and studied the flow field characteristics of four cylinder pile under seven different angles of incoming flow and three typical spacing ratios,the drag coefficient of each pile and the distribution of shear stress on the bed surface around the pile.The results show that both the angle of incoming flow and the spacing ratio have a strong influence on the flow characteristics of the four cylinder pile.With the angle of incoming flow increasing from 0°to 45°,the shear stress distribution mode of the downstream pile bed surface gradually changes from the shielded state to the separated flow impact state.When the spacing ratio is 1.0,the critical shielding angle is 5°.When the spacing ratio is 1.5 or 2.0,and the angle of incoming flow is between 20°and 30°,the drag coefficient of each pile is in the range of 1.0±0.2,and the shielding effect is minimal.

关 键 词：雷诺平均法 迎流角 间距比 四圆柱桩 数值模拟 

分 类 号：TV135.9[水利工程—水力学及河流动力学]