闸站结合泵站前池流态优化  

Optimization of Flow Pattern in the Forebay of Sluice-pump Station Project

作　　者：奚斌[1] 郑雅珍 段元锋 杨旭 鲁儒 XI Bin;ZHENG Ya-zhen;DUAN Yuan-feng;YANG Xu;LU Ru(School of Water Resources Science and Engineering, Yangzhou University, Yangzhou 225000, 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：《长江科学院院报》2021年第12期91-97,110,共8页Journal of Changjiang River Scientific Research Institute

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：为了优化闸站结合泵站运行时的前池流态,消除不良流态的影响,采用物理模型试验和数值模拟相结合的方法,分析了不良流态发生的原因。提出了多种优化整流方案,研究了其整流效果,构建了由带通水孔的导流墙、Y型导流墩和沿流向导流坎所形成的组合式整流措施。数值模拟发现,带通水孔的导流墙能够有效缩小并上移导流墙后回流区,再借助Y型导流墩和沿流向导流坎的整流作用,能使前池水流均匀顺直地进入进水池,较好地解决了因横向流速产生的偏流问题。研究结果表明,该组合式整流措施使得进水流道进口流速均匀度由86.30%提高到了93.46%,进水池两侧轴向流速偏差度由原来的12.63%下降为3.47%,整流效果显著。研究成果可为类似泵站工程流态改善提供参考。The aim of this study is to optimize the flow pattern in the forebay of sluice-pump station and eliminate the influence of unfavorable flow pattern.Causes of unfavorable flow pattern were analyzed via physical model test and numerical simulation.The effects of several optimized flow-rectifying schemes were examined,and a combinatorial rectification measure composed of diversion wall with drainage holes,Y-shaped diversion pier and diversion bucket along the flow direction was proposed.Numerical simulation verified that the diversion wall with drainage holes effectively reduced and moved upwards the backflow zone behind the diversion wall;the Y-shaped diversion pier and the diversion bucket along the flow direction helped the water flow in the forebay enter the pool uniformly and directly,hence solving the problem of flow deviation caused by transverse velocity.The proposed optimization scheme enhanced the uniformity of inlet velocity from 86.30%to 93.46%,and reduced the deviation of axial velocity from 12.63%to 3.47%.The research results implied sound effect of flow rectification.

关 键 词：泵站 前池 整流 数值模拟 流态优化 

分 类 号：S277.9[农业科学—农业水土工程] TV675[农业科学—农业工程]