摘要
在常州市魏村枢纽原设计方案中,闸站导流墙侧泵站边机组前方易形成大尺度回流、旋涡等,以致引起边机组前方水流流动紊乱、降低机组运行效率,甚至会引起水泵振动。针对上述不良流态的影响,通过CFD数值模拟方法,分析了3种不同整流方案对该闸站枢纽泵站不同工况的水流整流效果,总结了不同方案的水流流动规律。在上述分析成果的基础上,提出了组合式整流墩布置方案,并分析了其整流机理。计算结果表明:组合式整流墩布置方案能大幅度降低边墩机组侧向大尺度回流强度,回流现象基本消失,有效地改善了不同工况下泵站进水的不良流态,提高了箱涵流道进水效率,达到了预期整流效果。组合式整流墩布置方案已被魏村枢纽泵站初步设计、施工图设计采纳应用。研究成果可为其他类似大型闸站工程设计提供技术参考与借鉴。
In the original design scheme of Weicun sluice-pump station in Changzhou City,a large-scale return and vortex easily formed in the front of the units on the diversion wall side,which could even cause the water flow disorder in front of the side units,reduce the operation efficiency of the units,and even cause the vibration of the water pump.For mitigating bad flow patterns,the water flow rectification effect of three different rectification schemes was analyzed by CFD numerical simulation method,and the water flow laws under different schemes were summarized.Based on the above analysis results,the rectification mechanism was analyzed.The calculation results showed that the combined rectifier pier could greatly reduce the lateral large-scale backflow strength of the side-pier unit,the backflow basically disappeared,the water inflow pattern of the pump station under different working conditions were effectively improved,and the water inflow efficiency of the box culvert channel was improved,achieving expected rectification effect.The layout scheme of integrated rectifier pier had been adopted and applied by the preliminary design and construction drawing design,which can provide technical reference for other similar large sluice-pump stations.
作者
苏叶平
徐文俊
徐静
李学德
SU Yeping;XU Wenjun;XU Jing;LI Xuede(Jiangsu Surveying and Design Institute of Water Resources Co.,Ltd.,Yangzhou 225127,China;Yangzhou Survey Design Research Institute Co.,Ltd.,Yangzhou 225127,China)
出处
《人民长江》
北大核心
2021年第12期151-156,167,共7页
Yangtze River
基金
江苏省水利科技项目(2020012)。
关键词
闸站枢纽
不良流态
整流效果
组合式整流墩
魏村枢纽
常州市
sluice-pump station junction
bad flow pattern
rectification effect
combined rectifying pier
Weicun junction
Changzhou City
