多孔溢洪道水力特性的三维数值模拟  

Three-dimensional numerical simulation on hydraulic characteristics of spillway with multi-opening

作　　者：宁利中[1] 宁碧波[2] 宁景昊 田伟利[3] NING Li-Zhong;NING Bi-Bo;NING Jing-Hao;TIAN Wei-Li(State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China,Xi an University of Technology,Xi an 710048,China;College of Civil Engineering and Architecture,Jiaxing University,Jiaxing 314001,Zhejiang,China;Department of Architecture,Shanghai University,Shanghai 200444,China)

机构地区：[1]西安理工大学省部共建西北旱区生态水利国家重点实验室,西安710048 [2]嘉兴学院建筑工程学院,浙江嘉兴314001 [3]上海大学建筑系,上海200444

出　　处：《黑龙江大学工程学报》2022年第4期18-26,共9页Journal of Engineering of Heilongjiang University

基　　金：国家自然科学基金面上项目(10872164);西北旱区生态水利工程国家重点实验室基金项目(2017ZZKT-2)。

摘　　要：为研究多孔溢洪道水流特性及水流在闸墩后泄槽内汇合与扩散情况,对溢洪道主要水力特性进行了数值模拟。使用Gambit对模型进行网格划分,紊流时均方程使用RNG k-ε紊流模型封闭,自由表面采用VOF算法模拟。模拟得出溢洪道水面线、底流速的变化,速度分布,压强等水力参数与试验数据吻合一致。通过对溢洪道流场分析,进一步对溢洪道闸墩后多孔水流汇合与扩散边界问题进行了研究。得出了闸墩后多孔溢洪道水流汇合的长度和水流单侧横向扩散宽度的经验关系式。结果表明该数值方法很好地模拟了多孔溢洪道的水力特性。In order to study the flow characteristics of spillway with multi-opening and the convergence and the lateral divergence of the flow in the chute behind the pier,the main hydraulic characteristics of the spillway were numerically simulated.Gambit is used to mesh the model,RNG k-εturbulence model is used to close the turbulence time-averaged equations,and VOF algorithm is used to simulate the free surface.The simulation results show that the hydraulic parameters of spillway,such as water surface line,bottom velocity,velocity distribution and pressure,agree well with the experimental data.By analyzing the flow field of spillway,the flow convergence and lateral divergence boundary of spillway with multi-opening behind pier are further studied.Empirical formula of the flow convergence length and the unilateral lateral divergence width of spillway with multi-opening behind pier are obtained.The results show that the numerical method presented can well simulate the hydraulic characteristics of spillway with multi-opening behind pier.

关 键 词：多孔溢洪道 水流汇合 单侧横向扩散宽度 水力特性 数值模拟 

分 类 号：TV135.23[水利工程—水力学及河流动力学]