斜向进流城市雨水泵站引水建筑物流态改善数值模拟  

Numerical Simulation of Improvement of Flow Pattern in the Diversion Structure of the Urban Storm Water Pumping Station with Slanted Intake

作　　者：李志祥 冯建刚[1,2] 钱尚拓 王晓升 LI Zhi-xiang;FENG Jian-gang;QIAN Shang-tuo;WANG Xiao-sheng(College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, Jiangsu Province China;Water Conservancy Project & Civil Engineering College, Tibet Agriculture & Animal Husbandry University, Linzhi 860000, Xizang Province China;College of Agriculture Engineering, Hohai University, Nanjing 210098, Jiangsu Province China)

机构地区：[1]河海大学水利水电学院,江苏南京210098 [2]西藏农牧学院水利土木工程学院,西藏林芝860000 [3]河海大学农业工程学院,江苏南京210098

出　　处：《中国农村水利水电》2020年第6期139-143,147,共6页China Rural Water and Hydropower

基　　金：国家自然科学基金项目(51779082)(51009051);中央高校基本科研业务费专项资金(2019B18414)。

摘　　要：为研究斜向进流城市雨水泵站引水建筑物内的水力流动特性,以改善不良流态,提高引水建筑物的配水均匀性,基于VOF模型与RNG k-ε湍流模型对上海市北新泾雨水泵站引水建筑物内水流流态及其配水特性进行了数值模拟。针对引水建筑物中出现的不良流态提出整流措施并对数值结果进行了物理模型试验验证。结果表明:斜向箱涵进流容易造成格栅井各孔流量分配不均且存在回流、漩涡等不良流态,影响泵站运行安全;采用“分流墩、横梁以及张角渐扩导流墩”的组合式整流措施可以显著改善分水箱涵、扩散段以及拦污栅处的不良流态,提高格栅井各孔的流量分配均匀程度;物理模型试验进一步验证了整流措施的有效性及数值计算方法的可靠性。In order to study the water flow characteristics in the urban storm water pumping station with slanted intake,this paper improves the adverse flow pattern and the water distribution uniformity of the diversion structure.Based on the VOF model in multiphase flow theory of ANSYS CFX software and the RNG k-εturbulence model,the flow pattern of the diversion structure and its water distribution uniformity are simulated.Both rectification measures applied to the diversion structure and numerical results are verified by physical model test.The results show that there are flow mal-distribution and some adverse flow patterns in the diversion structure,e.g.backflow,vortex flow,which is caused by the inflow from oblique culverts,affecting the security of station.The rectification measures,including splitting-flow pier,beam and expanding angle piers,improve the flow pattern and the uniformity of the flow distribution.Furthermore,physical model tests verify effectiveness of rectification measures and reliability of numerical method.

关 键 词：城市雨水泵站 引水建筑物 流态 流量分配 整流措施 数值模拟 

分 类 号：TV675[水利工程—水利水电工程]