抽蓄电站无压隧洞交叉区体型优化试验研究  

Experimental Study on Shape Optimization of Nonpressure Tunnel Intersection Area in Pumped Storage Power Station

作　　者：田静[1] 顾长宽 郭汉驰 薛海 TIAN Jing;GU Chang-kuan;GUO Han-chi;XUE Hai(Yellow River Conservancy Technical Institute,Kaifeng 475004,China;Kaifeng Hydrology and Water Resources Survey Bureau,Kaifeng 475003,China;Shenzhen Guangming Construction First Construction Engineering Co.,Ltd.,Shenzhen 518107,China;School of Water Conservancy,North China University of Water Resources and Electric Power,Zhengzhou 450046,China)

机构地区：[1]黄河水利职业技术学院水利工程学院,河南开封475004 [2]河南省开封市水文水资源勘测局,河南开封475003 [3]深圳市光明建工第一建设工程有限公司,广东深圳518107 [4]华北水利水电大学水利学院,河南郑州450046

出　　处：《水电能源科学》2024年第10期115-117,38,共4页Water Resources and Power

基　　金：国家自然科学基金重点项目(41930643)。

摘　　要：交叉无压隧洞交汇区域水流的水力特性复杂,无压隧洞交叉区体型及交汇口水流水力特性的研究对确保水利枢纽的安全运行具有重要的工程意义。基于物理模型试验,对某抽水蓄能电站下水库高落差泄洪排沙洞和放空洞交叉区体型进行优化,最终确定圆弧连接+交叉角21°的交叉区体型。对比分析圆弧连接+交叉角21°的交叉区优化体型下特征试验工况的水力特性。结果表明,6种特征试验工况下,泄洪排沙洞和放空洞交叉口及下游均为急流,明流泄洪且流态较稳定,均在交汇口下游右边直墙处形成最大水深,水深低于直墙高度,满足水面线不宜超过直墙范围的要求。Given the complex hydraulic characteristics of water flow in the intersection area of non-pressure tunnels,the study on the shape of the intersection area and the hydraulic characteristics of the confluence zone has great engineering significance for ensuring the safe operation of the water conservancy project.Based on the physical model test,the shape of the intersection area of the high drop sediment discharge tunnel and emptying tunnel of the lower reservoir of a pumped storage power station was optimized.Finally,the intersection shape of the arc connection+cross angle 21°was determined,and the hydraulic characteristics under the optimized shape of intersection area were analyzed.The results show that under the six characteristic test conditions,the intersection area and downstream are rapid flow without pressure flow,the flow pattern is stable.The maximum water depth is formed at the right straight wall of the intersection area,the water depth is lower than the height of the straight wall,which meets the requirement that the water surface line should not exceed the straight wall.

关 键 词：交叉无压隧洞 体型优化 交汇水流 抽水蓄能电站 模型试验 

分 类 号：TV651.3[水利工程—水利水电工程]