基于数值模拟的低水头闸坝工程下游冲刷动力研究  

Research on Downstream Scouring Dynamics of Low Head Sluice Dam Engineering Based on Numerical Simulation

作　　者：薛玉山 郭萍 XUE Yu-shan;GUO Ping(Bozhou Qiaocheng District Water Conservancy Bureau,Bozhou 236800,Anhui,China)

机构地区：[1]安徽省亳州市谯城区水利局,安徽亳州236800

出　　处：《水利科技与经济》2024年第1期30-35,共6页Water Conservancy Science and Technology and Economy

摘　　要：针对低水头闸坝工程长期面临下游河床冲刷问题,通过不同工况参数分析,构建闸室断面水工模型。同时,基于Fluent平台构建数值模型,采用边界设置以及动网格宏函数控制流体突变,从而改进模型。结果表明,粒径与冲刷流量对冲刷坑深度以及范围有直接影响;对下游冲刷坑流速进行分布数值模拟,二次开发模型能准确反映实际冲刷情况,相对误差0.092%,优于原有模型。研究成果可为水利工程的建设与维护提供技术参考。Low head gate dam engineering has long faced downstream riverbed erosion problems.For this reason,a hydraulic model of the gate chamber section is constructed through analysis of different operating conditions and parameters.At the same time,a numerical model is constructed based on the fluent platform,and boundary settings and dynamic mesh macro functions are used to control fluid mutation and improve the model.In experimental analysis,particle size and erosion flow rate have a direct impact on the depth and range of erosion pits.Numerical simulation of the flow velocity distribution in downstream scouring pits shows that the secondary development model can accurately reflect the actual scouring situation,with a relative error of 0.092%,which is superior to the original model.The research results provide important technical references for the construction and maintenance of water conservancy engineering.

关 键 词：数值模拟 低水头闸坝工程 冲刷 Fluent 动网格 

分 类 号：TV641[水利工程—水利水电工程]