江苏水利Issue(12)：1-8,13,9.
不同工况下拦污栅对大中型泵站装置性能影响研究
Study on the influence of trash racks on the performance of large and medium-sized pump station units under different operating conditions
摘要
Abstract
The CFD numerical simulation method was used to calculate the internal flow state of the pump device under different grate bar spacings,different clogging degrees in front of the racks,and different water levels on the inlet side,and the influence of the trash rack on the pump unit performance under different operating conditions was analyzed.The results show that:with the decrease of the clear spacing of grate bars,the peak efficiency of the corresponding pump unit decreases;as the height of the clogging substances at the bottom of the trash rack increases,the flow lines after passing through the trash rack incline obviously downward,requiring a longer distance to restore uniform flow,and the orifice flow ratio on both sides of the trash rack gradually increases;compared with the design water level,the orifice flow ratio distribution under the ultra-low water level condition on the intake side is more uneven.Overall,to ensure the safe and stable operation of the unit,the clogging height of pollutants in front of the trash rack should be less than 20%of the inlet height of the pumping station.关键词
拦污栅/泵装置性能/栅条间距/堵塞程度/不同工况Key words
trash rack/pump device performance/grate bar spacing/clogging degree/different working conditions分类
建筑与水利引用本文复制引用
LIU Jianlong,XU Xuemei,CHENG Li,ZHU Feng,LEI Shuaihao,XUE Haipeng..不同工况下拦污栅对大中型泵站装置性能影响研究[J].江苏水利,2025,(12):1-8,13,9.基金项目
江苏省水利科技项目(2022017) （2022017）
江苏水利设计院科技项目(SJRD66) （SJRD66）
