弯曲航道串列桥墩紊流宽度研究及应用  

Study and Application of Turbulent Width of Crossbridge Piers in Curving Channel

作　　者：谭志荣[1,2] 陈彬 李青云 陈维 林黎明 TAN Zhirong;CHEN Bin;LI Qingyun;CHEN Wei;LIN Liming(School of Navigation, Wuhan University of Technology, Wuhan 430063, China;Hubei Inland Shipping Technology Key Laboratory, Wuhan 430063, China;Changjiang River Administration of Navigational Affairs, Wuhan 430010, China;Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China)

机构地区：[1]武汉理工大学航运学院,武汉430063 [2]内河航运技术湖北省重点实验室,武汉430063 [3]交通运输部长江航务管理局,武汉430010 [4]中国科学院力学研究所流固耦合系统力学重点实验室,北京100190

出　　处：《武汉理工大学学报（交通科学与工程版）》2022年第1期166-170,共5页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：国家自然科学基金(51809207)。

摘　　要：为解决弯曲航道桥梁通航宽度计算中桥墩紊流宽度计算精度不足的问题,依据实际弯曲航道串列桥墩及其水流条件,进行模型简化,采用DES中的SST k-ω模型,利用Fluent软件对弯曲航道桥区流场进行二维模拟.通过对比弯曲航道不同弯曲半径、桥墩直径,以及来流速度的流场研究桥墩紊流宽度的变化规律.仿真结果表明:弯曲航道凸岸侧桥墩紊流宽度大于凹岸侧桥墩紊流宽度,紊流宽度随着弯曲半径的增大而减小,随着桥墩直径及来流速度的增大而增大.进而拟合得出紊流宽度的计算公式.并通过工程实例验证了改进后的紊流宽度经验公式的准确性.In order to solve the problem that the calculation accuracy of turbulent width of piers is insufficient in the calculation of navigation width of bridges in curved channel,the model was simplified according to the actual tandem piers in curved channel and their flow conditions.The SST k-ωmodel in DES was used to simulate the flow field in curved channel bridge area in two dimensions by using Fluent software.By comparing the flow fields of different bending radius,pier diameter and incoming flow velocity of curved channel,the variation law of turbulent width of pier was studied.The simulation results show that the turbulent width of piers on the convex bank side of curved channel is larger than that on the concave bank side,and the turbulent width decreases with the increase of bending radius,but increases with the increase of pier diameter and incoming velocity.Then,the formula of turbulent width is obtained by fitting.Finally,the accuracy of the improved empirical formula of turbulent width is verified by an engineering example.

关 键 词：弯曲航道 桥墩 紊流宽度 数值模拟 

分 类 号：U611[交通运输工程—船舶及航道工程]