导流墙对弯形河道中闸室水流条件变化的影响研究  

Study on the Influence on the Change of Flow Condition of Sluice Chamber in Curved Channel by Guide Wall

作　　者：王继东 顾峰 谢政廷 WANG Ji-dong;GU Feng;XIE Zheng-ting(Wuxi Water Conservancy Designing Institute Co.Ltd.,Wuxi 214023,China;Xinwu District Water Conservancy Bureau,Wuxi 214000,China;Wuxi Taihu New City Co.Ltd.,Wuxi 214121,China)

机构地区：[1]无锡市水利设计研究院有限公司,江苏无锡214023 [2]新吴区水利局,江苏无锡214000 [3]无锡市太湖新城置业有限公司,江苏无锡214121

出　　处：《海河水利》2020年第4期47-50,61,共5页Haihe Water Resources

摘　　要：为研究闸门开启过程中的水流流态特征和导流墙对闸后水流流态的影响特征,选定江苏某特定闸门放水过程进行水力模型试验。研究表明,闸门开启过程中水流流态具有典型的三元非恒定流流态特征,闸后渠道水深随着闸门开启过程呈现先快速上升、然后缓慢上升、最后趋于稳定的状态;渠道水深增加速率与闸门开启历时呈反相关关系;三元恒定流水力试验中,导流墙的设置约束了渠道两侧水流对主流的挤压作用,增大了水跃宽度,降低了主流临界深度,削弱了下泄水流对消力池的冲刷作用;三元非恒定流试验中,导流墙增强了对下泄水流的引导作用,降低了下泄水流流速,提前了二次水跃的发生位置,降低了闸门开启过程中非恒定三元流二次水跃对海漫段的冲刷作用。In order to study the characteristics of flow pattern in the process of gate opening and the influence of guide wall on the flow pattern behind the gate,a specific gate in Jiangsu Province is selected for hydraulic model test.The results show that the flow pattern in the process of gate opening is a typical three-dimensional unsteady flow pattern.The water depth in the channel behind the gate firstly increases rapidly,then slowly,and finally tends to be stable during the gate opening pro⁃cess.The increase rate of water depth in the channel is inversely related to the opening duration of the gate.In the three-di⁃mensional constant flow force test,the setting of guide wall restricts the squeezing action from two side flows towards the main flow,increases the width of hydraulic jump,lowers the critical depth of main flow and weakens the scouring action from letdown flow towards stilling pool.In the three-dimensional unsteady flow test,the guide wall enhances the leading role of the letdown flow,reduces the flow velocity,raises the position of the second hydraulic jump,and reduces the second water of the unsteady three-dimensional flow in the gate opening process Sand flushing in the transgressive zone.

关 键 词：水力模型试验 闸门开启 三元流 水流流态 导流墙 

分 类 号：TV661[水利工程—水利水电工程] TV131.3