箱涵式双层流道后壁结构优化分析  

Optimization Analysis of the Back Wall Structure of Box-Culvert Double Flow Channel

作　　者：赵振江 石磊 蒋红樱 成立[3] 张聪聪 卜舸[4] ZHAO Zhen-jiang;SHI Lei;JIANG Hong-ying;CHENG Li;ZHANG Cong-cong;BU Ge(Sihong Water Conservancy Bureau,Suqian 223900,Jiangsu Province,China;Hydraulic Engineering Science and Technology Consultation Limited Company of Jiangsu Province,Nanjing 210029,China;College of Hydraulic Science and Engineering,Yangzhou University,Yangzhou 225009,Jiangsu Province,China;Jiangsu Provincial Water Conservancy Survey and Design Institute Co.,Ltd,Yangzhou 225009,Jiangsu Province,China)

机构地区：[1]泗洪县水利局,江苏宿迁223900 [2]江苏省水利工程科技咨询股份有限公司,南京210029 [3]扬州大学水利科学与工程学院,江苏扬州225009 [4]江苏省水利勘测设计研究院有限公司,江苏扬州225009

出　　处：《中国农村水利水电》2021年第6期102-105,113,共5页China Rural Water and Hydropower

基　　金：国家自然科学基金项目(51779214);江苏省第五期“333高层次人才培养工程”。

摘　　要：为优化箱涵式双层流道后壁结构,基于CFX软件,采用RNG k-ε紊流模型,对方形、圆形、ω形后壁进行了数值模拟,分析了不同组合方式对箱涵式进出水流道内流态的影响。数值结果表明:方形后壁的进水流道流态较好,但是出水流道的流态比较紊乱,出水流道段断面流速均匀度较差,加权平均角较低,进水流道后壁形状为ω形,出水流道后壁形状为圆形时,进出水流道的流态得到了明显的改善,出水断面流速均匀度提高35.4%,加权平均角提高10.2°,优化效果比较突出,若考虑施工问题,也可只改变出水流道后壁形状。In order to optimize the back wall structure of the box-culvert double flow channel,based on the CFX software,RNG K-ε turbulence model is used to simulate the square,circular and ω shaped back wall,and the influence of different combinations on the flow pattern in the box culvert inlet and outlet channel is analyzed. The numerical results show that the flow pattern of the inlet channel with square back wall is better,but the flow pattern of the outlet channel is more disorderly,the flow velocity uniformity of the outlet channel section is poor,and the weighted average angle is low. The flow pattern of the inlet channel back wall is ω shape,and when the outlet channel back wall is circular,the flow pattern of the inlet and outlet channel is obviously improved. The uniformity of flow velocity and weighted average angle of the outlet section increases by 35.4% and 10.2° respectively. If the construction problem is considered,only the shape of the back wall of the outlet runner can be changed.

关 键 词：箱涵式 双层流道 后壁 优化 数值模拟 

分 类 号：TV131[水利工程—水力学及河流动力学]