摘要
为改善侧向进水泵站前池流态,基于CFX软件,采用RNG k-ε紊流模型,对无整流措施和布置"Y"形导流墩情况下的侧向进水前池进行了数值模拟,分析"Y"形导流墩位置、高度、角度、长度等因素对侧向进水泵站前池流态的影响。数值结果表明:无整流措施时,泵站前池左侧区域存在大面积回流区,泵站右侧机组水流偏斜非常明显,对机组有不利影响;"Y"形导流墩具有分流作用,通过在进水池前布置"Y"形导流墩可显著均匀流速、消除回流区,水流能够更均匀地流入各台机组。研究发现,当"Y"形导流墩位于进水池前33.33 D0、高度为1.11 D0、角度为120°、长度为2.78 D0时,侧向进水泵站前池流态有明显改善,进水池前行近流速分布更加均匀。
In order to improve the flow pattern in the forebay of the side-intake pumping station,the numerical simulations were performed on the forebay of the side-intake pumping station with no rectifying measures and settings of Y-shaped diversion piers using CFX software and RNG k-εturbulence model.An analysis of the influence of the position,height,angle,and length of the Y-shaped diversion piers on the improvement of the flow pattern in the forebay of the side-intake pump station were carried out.Numerical results indicated that if there was no rectification measure,then there was a large area of recirculation in the left area of the forebay of the pumping station.The water flow deflection on the right side of the pumping station was very obvious,which had an adverse effect on the unit.The Y-shaped diversion pier had a shunting effect.The velocity of flow can be significantly uniform by arranging the Y-shaped pier in front of the inlet pool.The recirculation zone could be eliminated,and the water flow could flow into the units more evenly.It was found that the flow pattern in the forebay of the side-intake pumping station significantly improved,and the approach velocity distribution before the inlet pool was more uniform when the Y-shaped diversion pier was located at 33.33 D0 in front of the inlet pool and the height was 1.11 D0,the angle was 120°and the length was2.78 D0,respectively.
作者
张聪聪
周春峰
周艳霞
许龙
成立
ZHANG Congcong;ZHOU Chunfeng;ZHOU Yanxia;XU Long;CHENG Li(College of hydraulic science and engineering,Yangzhou University,Yangzhou 225100,China;Nanjing Waterworks Management Center,Nanjing 210000,China;Agricultural and Rural Bureau of Dafeng Ditrict,Yancheng 224100,China;Shanghai Munici pal Engineering Design Institue(Group)Co.,Lid.,Shanghai 200082,China)
出处
《南水北调与水利科技（中英文）》
CAS
北大核心
2020年第3期192-200,共9页
South-to-North Water Transfers and Water Science & Technology
基金
国家自然科学基金(51779214)
江苏水利科技项目(2018035)
江苏省第五期“333高层次人才培养工程”
南京市水务科技项目2018-3。
关键词
“Y”形导流墩
侧向进水
前池
流态
数值模拟
Y-shaped diversion pier
side-intake
forebay
flow pattern
numerical simulation
