大偏角短引渠侧向进水泵站流场流态优化  

Optimization of flow Pattern of Lateral Inlet Pumping Station with Large Declination Angle and Short Diversion Canal

作　　者：奚斌[1] 王欣昱 张雄伟 徐健 陈志刚 沈世煊 陈叶欣 宋梓豪 连延续 吉睿 XI Bin;WANG Xin-yu;ZHANG Xiong-wei;XU Jian;CHEN Zhi-gang;SHEN Shi-xuan;CHEN Ye-xin;SONG Zi-hao;LIAN Yan-xu;JI Rui(College of Hydraulic Science and Engineering,Yangzhou University,Yangzhou 225000,Jiangsu Province,China)

机构地区：[1]扬州大学水利科学与工程学院,江苏扬州225000

出　　处：《中国农村水利水电》2024年第9期115-122,129,共9页China Rural Water and Hydropower

基　　金：国家自然科学基金项目(51541912);“十二五”国家科技支撑计划项目(2102BOD08B03-2)。

摘　　要：为了改善大偏角短引渠侧向进水泵站前池、进水池内偏流、回流和漩涡等不良流态,以某大型大偏角短引渠侧向进水泵站工程为研究对象,采用物理模型试验和数值模拟相结合的方式对初步设计方案下的前池、进水池流态进行分析,提出流速偏差系数λ作为评价指标,对工程进行优化,探讨前池的结构性改造对水流的整流效果,得出“弧形隔墩+改变底坡坡度+开设消涡孔”的组合方案为推荐整流方案,有效解决了前池及进水池内原设计存在的不良流态。研究结果表明,该整流方案使各个机组进水池偏差系数分别下降了37.03%、12.99%、22.29%、22.04%,显著改善了前池,进水池流态。研究结果可为类似大偏角短引渠侧向进水泵站前池及进水池流场流态优化提供参考,也可为类似短引渠泵站工程和进水建筑物的设计提供参考。In order to improve the bad flow patterns such as deviation,backflow and vortex in forebay and the inlet pool of the side inlet pump station of short approach channel with large deflection angle,the paper takes a large-scale side inlet pump station project of short approach channel with large deflection angle as the research object.The flow patterns in the forebay and inlet pool under the preliminary design scheme were analyzed by means of physical model test and numerical simulation,and the velocity deviation coefficientλwas proposed as the evalua-tion index.The project was optimized,and the effect of structural transformation of the forebay on water flow rectification was discussed.It was concluded that the combination scheme of“curved block+change of bottom slope+opening of vortex elimination hole”was the recom-mended rectification scheme,which effectively solved the bad flow pattern existing in the original design of the forebay and inlet pool.The re-search results show that the rectification scheme reduces the deviation coefficients of each unit′s inlet pool by 37.03%,12.99%,22.29%and 22.04%,respectively,and significantly improves the flow pattern of the front pool and inlet pool.The research results can provide a refer-ence for the optimization of the flow field of the forebay and the inlet pool of the similar large deflection angle short approach channel lateral intake pump station,as well as for the design of the similar short approach channel pumping station and intake buildings.

关 键 词：大偏角短引渠 侧向进水泵站 整流 前池 数值模拟 

分 类 号：TV675[水利工程—水利水电工程]