输水流量对渡槽水位波动的影响规律  

Influence Mechanism of Water Flow on Water Level Fluctuation in Aqueduct

作　　者：蒋莉 孟向阳 陈晓楠[3] 许新勇 JIANG Li;MENG Xiang-yang;CHEN Xiao-nan;XU Xin-yong(School of Water Conservancy,North China University of Water Resources and Hydropower,Zhengzhou 450046,China;School of Hydraulic Engineering,Dalian University of Technology,Dalian 116024,China;South-to-North Water Diversion Middle Route Project Construction Administration,Beijing 10o038,China;Water Resources Efficient Utilization and Guarantee Project Henan Collaborative Innovation Center,Zhengzhou 450046,China;Henan Research Center for Hydraulic Structure Safety Engineering Technology,Zhengzhou 450046,China)

机构地区：[1]华北水利水电大学水利学院,河南郑州450046 [2]大连理工大学水利工程学院,辽宁大连116024 [3]南水北调中线干线工程建设管理局,北京100038 [4]水资源高效利用与保障工程河南省协同创新中心,河南郑州450046 [5]河南省水工结构安全工程技术研究中心,河南郑州450046

出　　处：《水电能源科学》2022年第10期148-151,共4页Water Resources and Power

基　　金：国家重点研发计划(2018YFC0406901);国家自然科学基金项目(51979109);河南省重点研发与推广项目(192102310015);河南省科技创新人才计划(174200510020);河南省高校科技创新团队支持计划(19IRTSTHN030);河南省科技攻关计划项目(162102210074)。

摘　　要：针对南水北调中线工程在大流量输水期间,闸门敞泄运行,部分渡槽与渠道衔接出口处出现超常水位波动的问题,根据现场实测结果,基于RNGκ-ε紊流模型,采用FLOW-3D软件对渡槽内水流水力特性进行数值模拟,分析输水流量对渡槽内水流水力特性的影响。结果表明,下游尾墩处的卡门涡街局部阻水形成的水位波动向上游传递,流量越大,槽内水流越紊乱,水位波动振幅越大;随着输水流量的减小,流速减小,能量向上游传递过程中逐渐递减,当输水流量低于200 m^(3)/s后,水位波动将不再影响渡槽内水流的流速、水位等水力特性。In the middle route of South-to-North Water Transfer Project, the gate is open to discharge during the large flow water conveyance, and the abnormal water level fluctuation occurs at the outlet of some aqueducts and channels. According to the field measurement results, based on the RNG κ-ε turbulence model, the software FLOW-3 D was used to numerically simulate the flow hydraulic characteristics in the aqueduct, and the impact of water conveyance flow on the flow hydraulic characteristics in the aqueduct was analyzed. The results show that the water level fluctuation caused by local water resistance in the Karman vortex street at the downstream tail pier is transmitted to the upstream. The greater the flow rate, the more disordered the flow in the tank, and the greater the amplitude of water level fluctuation. With the decrease of water flow, the flow velocity decreases, and the energy transfer to the upstream is gradually decreasing. When the water flow is less than 200 m^(3)/s, the water level fluctuation will no longer affect the flow velocity, water level and other flow characteristics in the aqueduct.

关 键 词：流量 水位波动 数值模拟 水力特性 渡槽结构 

分 类 号：TV672[水利工程—水利水电工程] TV131