多机组泵站侧向进水前池流态及整流措施分析  

An Analysis of Flow Pattern and Rectification Measures of Lateral Inflow Forebay of Multi-unit Pumping Station

作　　者：常鹏程 杨帆[1] 孙丹丹 李忠斌 沈强儒 CHANG Peng-cheng;YANG Fan;SUN Dan-dan;LI Zhong-bin;SHEN Qiang-ru(School of Hydraulic Science and Engineering,Yangzhou University,Yangzhou 225009,Jiangsu Province,China;Xuzhou Water Conservancy and Architectural Design and Research Institute,Xuzhou 221002,Jiangsu Province,China;School of Transportation and Civil Engineering,Nantong University,Nantong 226019,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225009 [2]徐州市水利建筑设计研究院,江苏徐州221002 [3]南通大学交通与土木工程学院,江苏南通226019

出　　处：《中国农村水利水电》2021年第12期229-234,共6页China Rural Water and Hydropower

基　　金：国家自然科学基金(51609210);江苏省高校自然科学研究重大项目(20KJA570001);江苏省水利科技项目(2020029),扬州市校科技合作资金项目(YZU201901);江苏省研究生实践创新计划项目(SJCX21_1590)。

摘　　要：泵站侧向进水前池进水流态较差,易产生大范围大尺度的回流区域,导致泵站进水池流态恶化,为了明晰泵站侧向进水前池流态紊乱的问题,以江苏省徐州市境内翟山大沟泵站工程为研究对象,基于雷诺时均N-S方程和RNG k-ε模型,采用CFD技术对有无整流措施情况下该泵站多机组运行时侧向进水前池进行数值模拟的对比分析。结果表明:无整流措施的情况下3台机组的进水池内部均存在大范围的漩涡;通过采用多方案整流措施分析,相比原方案,降低侧向进水前池的纵向底坡且设置弧形导流墙时进水池流速分布均匀,流态最好,且各机组进水喇叭管进口面的平均轴向速度分布均匀度较原方案提高了约10%。The inlet flow pattern of the lateral inlet forebay of the pumping station is poor,and it is easy to produce a large-scale reflux area,which leads to the deterioration of the flow pattern of the inlet forebay of the pumping station.In order to clarify the problem of the flow pattern disorder of the lateral inlet forebay of the pumping station,the Zhaishan Dagou pumping station project in Xuzhou City,Jiangsu Province is taken as the research object.Based on the Reynolds time-averaged N-S equation and the RNG k-εmodel,the CFD technology is used to carry out the comparative analysis of the numerical simulation of the lateral inlet forebay of the pumping station under the operation of multiple units with and without rectification measures.The results show that there is a wide range of vortex in the intake pool of the three units without rectification measures.Through the analysis of multi-scheme rectification measures,compared with the original scheme,the flow velocity distribution of the inlet pool is uniform and the flow pattern is the best when the longitudinal bottom slope of the lateral inlet front pool is reduced and the arc guide wall is set up,and the average axial velocity distribution uniformity of the inlet bell tube inlet surface of each unit increases by about 10%compared with the original scheme.The research results of this paper provide a certain reference for the improvement of the flow pattern of the lateral inflow front pool of the pumping station.

关 键 词：泵站 侧向进水 前池 流态 整流 

分 类 号：TV675[水利工程—水利水电工程] TV135