摘要
针对沙河水库新建溢洪道泄洪消能区下游河谷狭窄,弯曲角度大,存在崩塌体,河道地形地质条件复杂等问题,以挑流鼻坎反弧段半径和出口挑角为体型特征参数,采用FLUENT软件对拟定的体型对比方案进行了数值模拟,分析了各方案下挑流鼻坎挑流消能时水力特性参数(沿程流速、临底压强以及水舌挑流形态等),并进行了推荐体型的物理模型试验。研究成果表明:挑坎出口角度19.42°,反弧段半径33.84 m的挑流鼻坎体型下挑流水舌落点能远离下游崩塌体,减缓下游冲刷程度。在此基础上,对下游崩塌体的防护进行了不同方案的对比试验并推荐了可行的防护措施。
In order to solve the problems of narrow valley,large bending angle,collapse,complicated river topography and geological conditions in the downstream of the flood discharge energy dissipation area of the newly built spillway of Shahe Reservoir in Wulong County,Chongqing,this paper takes the two characteristic parameters of radius r and jet angle θ_(1),makes three shape schemes,and uses FLUENT software to conduct numerical simulation.The hydraulic characteristic parameters(flow velocity,pressure and deflecting flow pattern,etc.)are analyzed under the different type of flip bucket energy dissipation.The results show that the scheme with the angle 19.42°and the radius 33.84 m successfully narrates the water tongue drop point,keeps away from the downstream collapse body and reduces downstream scouring.On this basis,different schemes for protection of downstream collapse are compared and the final protection measures are recommended.
作者
何志亚
冷月华
杨磊
李修妍
刘文超
HE Zhi-ya;LENG Yue-hua;YANG Lei;LI Xiu-yan;LIU Wen-chao(Honghe Water Conservancy and Hydropower Survey and Design Institute of Yunnan Province,Mengzi,Yunnan,661100;State Key Laboratory of Water Resource and Hydropower Engineering Science,Wuhan University,Wuhan,Hubei,430072)
出处
《中国农村水利水电》
北大核心
2021年第12期6-11,18,共7页
China Rural Water and Hydropower
基金
国家自然科学基金资助项目(50809052)。
关键词
溢洪道
挑流鼻坎
数值模拟
水力特性
模型试验
spillway
flip bucket
numerical simulation
hydraulic characteristics
hydraulic model test
作者简介
何志亚(1979-),男,高级工程师,主要从事水工及相关专业设计研究。E-mail:330586036@qq.com;通讯作者:杨磊(1974-),男,副教授,博士,主要从事水工及施工水力学、施工组织管理研究。E-mail:Lylshow@Whu.edu.cn。
