梯形断面鱼道内水流的三维特性分析  

Three-dimensional characteristics analysis of flow in trapezoidal fishway

作　　者：李恒 王晓刚[2] 郑飞东 LI Heng;WANG Xiaogang;ZHENG Feidong(Nanjing Jiangbei New Area Ecological Environment and water Bureau,Nanjing 210031,China;Hydraulic Engineering Department of Nanjing Hydraulic Research Institute,Nanjing 210029,China;College of River and Ocean Engineering,Chongqing Jiaotong University,Chongqing 404100,China)

机构地区：[1]南京江北新区生态环境和水务局,江苏南京210031 [2]南京水利科学研究院水工水力学研究所,江苏南京210029 [3]重庆交通大学河海学院,重庆404100

出　　处：《河海大学学报（自然科学版）》2023年第1期61-65,76,共6页Journal of Hohai University(Natural Sciences)

基　　金：重庆市自然科学基金(cstc2020jcyj-bshX0043)。

摘　　要：运用三维数学模型,对横断面为梯形的鱼道内水流流态进行数值模拟分析,结果表明:梯形断面鱼道内水流具有明显的三维特性;增大梯形断面鱼道竖缝过水断面面积比会减弱鱼道内水流的三维特性,在过水断面面积比小于0.375时,鱼道内水流三维特性较为明显;鱼道池室长宽比的变化对鱼道内水流三维特性的影响不大。The three-dimensional mathematical model was used in the numerical simulation of the flow pattern in the fishway with trapezoidal cross-section. The results showed that the trapezoidal fishway has obvious three-dimensional characteristics of the water flow. It will weaken the three-dimensional characteristics of the flow within trapezoidal fishway when the water area ratio in the vertical slot increases. When the water area ratio is less than 0.375, the three-dimensional characteristics is more obvious. The aspect ratio of the pool room has little effect on the three-dimensional flow characteristics in the fishway.

关 键 词：梯形断面鱼道 三维特性 竖缝 过水断面面积比 长宽比 

分 类 号：TV135[水利工程—水力学及河流动力学]