泵站圆弧扩散型正向进水前池泥沙体积浓度分布特征  

Distribution characteristics of sediment volume concentration in forebay of circular diffusion type of pumping station

作　　者：樊新建[1] 李龙基 陆亚楠 王辉 贾广钰 孙江河 FAN Xinjian;LI Longji;LU Yanan;WANG Hui;JIA Guangyu;SUN Jianghe(College of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou,Gansu 730050,China;Gansu Jingtaichuan Electric Power Irrigation Water Resource Utilization Center,Jingtai,Gansu 730400,China;Water Resources and Hydropower Survey and Design Research Institute Co.,Ltd.,Lanzhou,Gansu 730099,China)

机构地区：[1]兰州理工大学能源与动力工程学院,甘肃兰州730050 [2]甘肃省景泰川电力提灌水资源利用中心,甘肃景泰730400 [3]甘肃省水利水电勘测设计研究院有限责任公司,甘肃兰州730099

出　　处：《排灌机械工程学报》2024年第11期1135-1141,共7页Journal of Drainage and Irrigation Machinery Engineering

基　　金：国家自然科学基金资助项目(513798128);甘肃省自然科学基金资助项目(21JR7RA238);甘肃省科技计划项目(甘科计[2021]18号);甘肃省水利科学试验研究及技术推广项目(23GSLK038)。

摘　　要：以多泥沙河流为取水水源的泵站正向进水前池存在泥沙沉积、泵站性能降低等问题.选取甘肃省景泰川电力提灌工程某泵站正向进水前池作为研究对象,设计圆弧扩散型正向进水前池体型结构,采用Fluent软件基于Realizable k-ε模型和Mixture多相流模型开展数值模拟计算,获得圆弧扩散型正向进水前池的泥沙体积浓度分布特征,揭示圆弧扩散型边墙收缩程度对前池内水沙运动特性的影响.结果表明:沿垂直水流方向,圆弧扩散型正向进水前池内泥沙体积浓度分布中间低、两侧高;沿水深方向,前池内泥沙体积浓度分布由表层至底层逐渐升高.相较直线扩散型正向进水前池,圆心角为44°的圆弧扩散型正向进水前池内高含沙区面积降低41.77%,泥沙淤积减少43.60%.研究成果可为同类型泵站前池优化设计提供指导与参考,有效促进泵站工程提质增效.The forward intake forebay of the pumping station,utilizing a multi-sediment sand river as its water source,encounters issues including sediment deposition,reduced operational effciency of the pumping station,etc.This study focus on the forward intake forebay of a pumping station in the Jingtai Chuan electric power lifting and irrigation project in Gansu Province as the object of investigation.The body structure of the circular diffusion type forward intake forebay was designed and numerical simulation utilizing Fluent software based on the realizable k-εmodel and the mixture multiphase flow model was carried out to obtain the distribution characteristics of sediment concentration.The distribution characteristics of sediment concentration in the circular diffusion forward intake forebay were analyzed to reveal the influence of the degree of contraction of the circular diffusion side wall on the movement cha-racteristics of water and sand in the forebay.The results show that,in the vertical flow direction,the sediment volume concentration distribution in the forebay of the circular diffusion type exhibits a lower concentration in the middle and high concentration on both sides.In the water depth direction,the distribution of sediment volume concentration in the forebay gradually increases from the surface to the bottom.In comparison to the linear diffusion type forward intake forebay,the area of high sand content in the circular diffusion type forward intake forebay with a center angle of 44°is reduced by 41.77%,and the sediment siltation is reduced by 43.60%.These findings offer valuable insights and guidance for the optimization design of the forebay of the same type of pumping stations,thereby contributing to enhancements in the engineering quality and operational efficiency of pumping station infrastructure.

关 键 词：泵站 扩散角 正向进水前池 流场结构 泥沙体积浓度 数值模拟 

分 类 号：TV671[水利工程—水利水电工程] S277.9[农业科学—农业水土工程]