槽身长度对南水北调中线工程典型渡槽水位波动现象的影响研究  

Research on the Influence of Trench Length on the Water Level Fluctuation of Typical Aqueducts in the Middle Route of South to North Water Transfer Project

作　　者：卢明龙 陈晓楠 刘高雄 尤亚攀 马颖[2,3,4] 许新勇 LU Ming-long;CHEN Xiao-nan;LIU Gao-Xiong;YOU Ya-Pan;MA Ying;XU Xin-yong(China South-to-North Water Diversion Middle Route Corporation Limited,Beijing 100038,Beijing,China;North China University of Water Conservancy and Hydropower,Zhengzhou 450046,Henan Province,China;Henan Collaborative Innovation Center for Water Resources Efficient Utilization and Guarantee Engineering,Zhengzhou 450046,Henan Province,China;Henan Provincial Hydraulic Structure Safety Engineering Technology Research Center,Zhengzhou 450046,Henan Province,China;PowerChina Kunming Engineering Corporation Limited,Kunming 650051,Yunnan Province,China)

机构地区：[1]中国南水北调集团中线有限公司,北京100038 [2]华北水利水电大学,河南郑州450046 [3]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 [4]河南省水工结构安全工程技术研究中心,河南郑州450046 [5]中国电建集团昆明勘测设计研究院有限公司,云南昆明650051

出　　处：《中国农村水利水电》2023年第9期110-114,共5页China Rural Water and Hydropower

基　　金：国家重点研发计划项目(2018YFC0406901);国家自然科学基金项目(51979109);2021年度水利青年科技英才资助项目。

摘　　要：南水北调中线工程大流量输水期间,部分渡槽出现了不同程度水位波动现象,对安全调度有一定影响,尤其是槽身越短的渡槽现象越明显。采用RNG k-ε模型和Tru-VOF方法,针对典型渡槽建立了不同槽身长度的若干组全三维数值模型,探究槽身长度参数对水位波动的影响。研究结果表明:渡槽下游尾墩出口处形成的卡门涡街是波动的策源地旋涡造成局部阻水,进而产生波动向上游传递。随着槽身长度增加,波动传递能量逐步耗散,流速最大值及水位波动幅值不断减小,当长度超过800 m后,水位波动能量基本耗散。成果可为工程平稳调度和安全运行提供借鉴与参考。During the large-flow water transmission of the middle line of the South-to-North Water Diversion Project,some aqueducts expe⁃rienced varying degrees of water level fluctuations,which had a certain impact on safety scheduling,especially the shorter the aqueduct body,the more obvious the phenomenon.In this paper,the RNG k-εmodel and Tru-VOF method are used to establish several sets of full three-dimensional numerical models with different tank lengths for typical aqueducts,and explore the influence of tank length parameters on water level fluctuations.The results show that the Carmen vortex street formed at the exit of the tail pier downstream of the aqueduct is the source of fluctuations,and the vortex causes local water blockage,which in turn generates fluctuations to be transmitted upstream.With the increase in the length of the tank,the fluctuation transfer energy is gradually dissipated,the maximum flow velocity and the amplitude of wa⁃ter level fluctuation continue to decrease,and when the length exceeds 800 m,the water level fluctuation energy is basically dissipated.The results can provide a reference for the smooth scheduling and safe operation of the project.

关 键 词：渡槽 槽身长度 数值模拟 水位波动 

分 类 号：TV672.3[水利工程—水利水电工程]