丁坝位置对河道水流交汇区影响的数值模拟研究  

Numerical simulation study of the effect of ding-dam location on the confluence zone of river flow

作　　者：贺博 HE Bo(China Coal Technology and Industry Xi'an Research Institute(Group)Limited,Xi'an 710077,Shaanxi;National Key Laboratory of Coal Mine Disaster Prevention and Control,Xi'an 710077,China;Shaanxi Provincial Key Laboratory of Coal Mine Water Hazard Prevention and Control Technology,Xi'an 710077,Shaanxi,China)

机构地区：[1]中煤科工西安研究院(集团)有限公司,陕西西安710077 [2]煤矿灾害防控全国重点实验室,陕西西安710077 [3]陕西省煤矿水害防治技术重点实验室,陕西西安710077

出　　处：《地下水》2024年第3期283-286,共4页Ground water

摘　　要：为解决交汇河道处支流对主流堤岸冲刷及航道通航的不利影响。通过在交汇口下游支流对岸侧建立丁坝,改变水流交汇区的水流结构,实现河道治理的目的。对物理水槽实验模型进行验证后,基于三维k-ε紊流模型、VOF法自由液面捕捉技术和PISO压力速度耦合算法,建立关于丁坝对水流交汇区影响的数值模型。通过控制变量法分析丁坝布置位置对水流交汇区水位、流速分布的影响规律。结果表明,在水流交汇区布置丁坝以后,丁坝下游出现回流区,回流区内流速值较小,可以对这一侧堤岸起到较好的保护作用。To address the adverse impacts of tributaries on mainstream bank scour and channel navigation at confluence channels.The purpose of river management is to change the flow structure in the confluence area by establishing a ding-dam on the opposite bank side of the tributary downstream of the confluence.After validation of the physical flume experimental model,a numerical model on the effect of ding-dams on the flow intersection zone is developed based on the three-dimensional k-εturbulence model,the free liquid surface capture technique of the VOF method,and the PISO pressure-velocity coupling algorithm.The influence law of the location of ding dam arrangement on the distribution of water level and flow velocity in the confluence area of water flow was analyzed by the control variable method.The results show that,after arranging the ding-dam in the confluence area,a return zone appears downstream of the ding-dam,and the value of the flow velocity in the return zone is small,which can provide a better protection for this side of the bank.

关 键 词：水流交汇区 丁坝 水流结构 数值模拟 河道治理 

分 类 号：TV147.4[水利工程—水力学及河流动力学] TV863