竖井式进水流道渐缩段线型与尺寸优化研究  

Research on the Optimization of Line Shape and Size of Tapered Section of Shaft Inlet Channel

作　　者：徐波 周秉南 夏辉[3] 陆伟刚[1] XU Bo;ZHOU Bing-nan;XIA Hui;LU Wei-gang(College of Hydraulic Science and Engineering,Yangzhou University,Yangzhou 225009,Jiangsu Province,China;Ningbo Water Conservancy and Hydropower Planning and Design institute Co.,Ltd.,Ningbo 315192,Zhejiang Province,China;Jiangsu Surveying and Design Institute of Water Resources Co.,Ltd.,Yangzhou 225127,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]宁波市水利水电规划设计研究院有限公司,浙江宁波315192 [3]江苏省水利勘测设计研究院有限公司,江苏扬州225127

出　　处：《中国农村水利水电》2023年第7期200-205,共6页China Rural Water and Hydropower

基　　金：国家自然科学基金面上项目(52079120,51779215)。

摘　　要：对某泵站的竖井式进水流道进行数值模拟计算,发现在竖井尾部汇合处出现脱流现象。从竖井渐缩段线型和尺寸角度出发,设计了15种优化方案,对竖井式进水流道的水力性能和竖井尾部汇合处的脱流现象展开研究,并对最优方案进行模型试验研究。结果表明:在竖井式进水流道尾部汇合处出现脱流现象会导致流道出口断面速度加权平均角度降低;同一竖井渐缩段线型方案下,竖井式进水流道的水力损失随着竖井渐缩段长度增大先减小后增大,速度加权平均角随竖井渐缩短长度增大逐渐递增;采用线型优化方案二时,进水流道竖井尾部汇合处不会出现脱流现象;在15种方案中,方案JS14的进水流道水力性能较优,为某泵站优选进水流道方案;采用方案JS14的泵装置模型试验最大效率可达77.57%,且装置进水流道水力损失的数值模拟和模型试验规律一致。Through the numerical simulation of the shaft inlet channel of a pump station,it is found that the flow separation phenomenon oc-curs at the confluence of the shaft tail.From the perspective of the line shape and size of the shaft tapering section,15 optimization schemes are designed to study the hydraulic performance of the shaft inlet channel and the flow separation phenomenon at the confluence of the shaft tail.The optimal scheme is studied by the model test.The results show that the flow separation at the tail confluence of the shaft inlet channel will reduce the weighted average angle of the outlet section velocity of the channel.Under the same linear scheme of the shaft tapering sec-tion,the hydraulic loss of the shaft inlet channel first decreases and then increases with the increase in tthe shaft tapering section length,and the velocity weighted average angle gradually increases with the increase in the shaft tapering section length.When the linear optimization scheme 2 is adopted,there will be no flow separation at the confluence of inlet channel and shaft tail.Among the 15 schemes,the hydraulic performance of the inlet channel of scheme JS14 is better,which is the preferred inlet channel scheme for a pump station.The maximum effi-ciency of model test of pump device adopting scheme JS14 can reach 77.57%,and the numerical simulation of the hydraulic loss in the inlet channel of the device is consistent with the model test.

关 键 词：竖井式进水流道 渐缩段 线型 尺寸 数值模拟 

分 类 号：TV131.63[水利工程—水力学及河流动力学]