非对称运行西河泵站前池试验分析  

Experimental analysis of forebay of Xihe pumping stationunder asymmetric operation

作　　者：徐鹏飞 陈业超 徐贵颖 张丽娟[1] 杨帆[2] XU Pengfei;CHEN Yechao;XU Guiying;ZHANG Lijuan;YANG Fan(Huai'an Water Conservancy Survey and Design,Huai'an 223005,China;College of Hydraulic Science and Engineering,Yangzhou University,Yangzhou 225009,China;Zhongshan Embankment Management Center,Zhongshan 528400,China)

机构地区：[1]淮安市水利勘测设计研究院有限公司,江苏淮安223005 [2]扬州大学水利科学与工程学院,江苏扬州225009 [3]中山市堤围管理中心,广东中山528400

出　　处：《南水北调与水利科技（中英文）》2024年第2期409-416,共8页South-to-North Water Transfers and Water Science & Technology

基　　金：江苏省水利科技项目(2022010,2021015),江苏省高校自然科学研究重大项目(20KJA570001);扬州市科技计划项目(YZ2022192)。

摘　　要：为明确西河泵站非对称机组运行时前池的流态特征,基于物理模型试验的方法对西河泵站的前池及进水流道进行整体物理模型试验,共获取4种不同开机方案时西河泵站前池的流场和速度分布规律,并采用计算流体动力学技术对最低水位时8台机组全开的方案进行数值分析。结果表明:在0.75负荷排涝时,非对称机组运行方案2的前池两侧有微弱旋流,开机方案3和开机方案4前池流态均平稳,开机方案3泵站进口断面的底流速分布均匀度为78.2%;推荐两侧边机组和中间机组各2台开机运行;在全负荷排涝流量且最低水位时,机组全开时两边机组流道进口的水力性能指标最低,在实际运行时应注意两侧边机组运行的安全稳定性。研究成果可为西河泵站的实际运行管理提供一定的参考。The forebay is a structure connecting the suction sump(inlet passage)and the diversion channel(igniting river)of the pumping station,and its flow pattern has a direct impact on the safe and stable operation of the pumping station unit.The drainage flow and diversion flow of Xihe pumping station in Zhongshan City,Guangdong Province,are both very large,and the diversion condition is lateral inflow.Higher requirements are now set forward for the flow conditions of the forebay of the pumping station.If the incoming flow of the forebay is not uniform,there will be adverse flow patterns such as bias flow,deflected flow,backflow,and air-core vortex,which will adversely affect the safe operation of the Xihe pumping station and the operating efficiency of the unit.In order to clarify the flow pattern characteristics of the forebay of Xihe pumping station during the operation of asymmetric units,taken the Xihe pumping station project as the research object,the physical model test method was used to carry out the overall physical model test of the forebay and inlet passage of the pumping station during different startup combinations.The computational fluid dynamic technology was used to numerically analyze the operation scheme of eight units fully open at the lowest water level.It was found that,when the eight units of the Xihe pumping station are fully opened for drainage,the mainstream is centered in the inland river diversion section.The surface velocity in the mainstream zone is mostly in the range of 0.9 m/s to 1.2 m/s and the surface velocity in front of the inlet of the pumping station is in the range of 0 to 0.6 m/s.In the outlet sump and the outer river section of the pumping station,the surface velocity in the mainstream zone is mostly in the range of 0.9 m/s to 1.2 m/s,and the maximum velocity is 1.44 m/s.The flow pattern of the upstream and downstream diversion sections of the pumping station is relatively smooth.The water surface fluctuation at the inlet of the pumping station is small,and the water flow is rel

关 键 词：西河泵站 前池 流态 开机方案 模型试验 

分 类 号：TV675[水利工程—水利水电工程]