闸门开度对泄洪排沙隧洞水力特性影响研究  

Influence of Gate Opening on Hydraulic Characteristics of Hydraulic Tunnel

作　　者：张雷[1,2] 王中林 苏昊 王先忠 曹尊毅 邹乐乐 ZHANG Lei;WANG Zhong-lin;SU Hao;WANG Xian-zhong;CAO Zun-yi;ZOU Le-le(Yellow River Institute of Hydraulic Research,YRCC,Zhengzhou 450003,China;Henan Engineering Research Center of Hydropower Engineering Abrasion Test and Protection,Zhengzhou 450003,China;Yellow River Water&.Hydropower Development Group Co.,Ltd.,Zhengzhou 450000,China;Xinjiang Huadian Hetian Hydropower Co.,Ltd.,Hetian 848000,China;Manzhouli Jinyuan Water Co.,Ltd.,Manzhouli 021400,China;College of Energy and Electric Engineering,Hohai University,Nanjing 210098,China;Henan Zhihe Engineering Technology Co.,Ltd.,Zhengzhou 450003,China)

机构地区：[1]黄河水利委员会黄河水利科学研究院,河南郑州450003 [2]河南省水电工程磨蚀测试与防护工程技术研究中心,河南郑州450003 [3]黄河水利水电开发集团有限公司,河南郑州450000 [4]新疆华电和田水电有限责任公司,新疆和田848000 [5]满洲里锦源水务有限责任公司,内蒙古满洲里021400 [6]河海大学能源与电气学院,江苏南京210098 [7]河南智河工程技术有限公司,河南郑州450003

出　　处：《水电能源科学》2023年第3期117-120,共4页Water Resources and Power

基　　金：国家自然科学基金项目(U1965110,52279134);黄河水利科学研究院基本科研业务费专项资金资助项目(HKY-JBYW-2022-01);江苏省研究生科研与实践创新计划项目(SJX22_0183,SJX21_0196)。

摘　　要：为揭示闸门开度对泄洪排沙隧洞水力特性的影响规律,建立了不同闸门开度下的排沙隧洞二维模型,采用VOF法和标准κ-ε紊流模型对泄洪排沙隧洞易磨蚀断面流场进行三维数值模拟计算,获得了闸门附近的流态、流速、压强等水力特性,并对比分析了不同闸门开度下的水力特性,得到了闸门处至挑坎之前的空化数。结果表明,当闸门小于1/2最大开度运行时,闸门开度越大,隧洞水流流态越平顺,临底流速过渡越平顺,且隧洞底板上下游压力差越小;闸门开度越小,有压洞内流速越小,容易造成泥沙淤积;闸门开度越大,对隧洞整体运行越有利。研究结果对水工隧洞闸门的运行开度优化及闸门底坎抗磨修复具有指导意义。In order to reveal the influence of the gate opening on the hydraulic characteristics of hydraulic tunnels, a two-dimensional model of silt-releasing tunnel with different gate openings was established. The VOF method and standard κ-ε turbulence model were used for three-dimensional numerical simulation calculation of flow field in abrasive section of flood silt-releasing tunnel. The hydraulic characteristics such as flow state, velocity and pressure near the gate were obtained. The hydraulic characteristics under different gate opening degrees were analyzed to obtain the cavitation number from the gate to the threshold. The results show that when the gate operation opening is less than 1/2 maximum opening, the larger the gate opening is, the smoother the tunnel flow state is, the smoother the flow velocity near the bottom is, the lower the pressure difference between the upstream and downstream of the tunnel floor is. The smaller the gate opening is, the smaller the flow rate in the pressure cave is, and it is easy to cause sediment deposition;The greater the opening of the gate is, the more favorable the overall operation of the tunnel is. The research results have guiding significance for the optimization of the operating opening of the hydraulic tunnel gate and the anti-wear repair of the gate bottom sill.

关 键 词：泄洪排沙隧洞 闸门开度 水力特性 VOF法 抗磨修复 

分 类 号：TV672.1[水利工程—水利水电工程]