摘要
发展新型溢流坝面结构对提高大坝的泄洪消能能力有重要意义。针对高坝水头高、下泄水流能量大而传统坝体消能效果较差、工程下游河道冲刷严重的问题,设计研发了一种包含分道挑流结构的新型溢流坝面结构,通过室内水力试验观测其挑流消能效果,引入消能率的概念定量测算溢流坝面结构的消能效果,同时通过数值模拟试验讨论溢流坝面结构空化特性及冲刷消能效果。研究结果表明,新型溢流坝面结构通过改变下泄水流流态分布,能够有效降低水流流速,减小其对下游河道的冲刷,为大坝的高效挑流消能提供了新思路。
The development of a new type of overflow dam face structure is of great significance for improving the dam’s ability to discharge flood and dissipate energy.In view of the engineering problems of high dam head height,large discharge energy,poor energy dissipation effect of the traditional dam,and serious erosion of the downstream channel of the project,a new type of overflow dam surface including a split channel deflecting structure was developed.The energy dissipation effect of the new overflow dam surface structure was observed by indoor hydraulic tests,and the concept of energy dissipation rate was introduced to quantitatively calculate the energy dissipation effect of the overflow dam surface structure.The cavitation characteristics of the overflow dam and the effect of erosion damage were discussed by numerical simulations.The results show that the new overflow dam face structure can effectively reduce the flow velocity and reduce the scouring of the downstream channel by changing the flow pattern of the released water flow,which provides a new engineering idea for the dam’s efficient deflecting flow and energy dissipation.
作者
励泽
秦鹏
张黎明
吴钧辉
刘港
杨栋
周晔凯
LI Ze;QIN Peng;ZHANG Li-ming;WU Jun-hui;LIU Gang;YANG Dong;ZHOU Ye-kai(College of Hydraulic and Environmental Engineering,Zhejiang University of Water Resources and Electric Power,Hangzhou 310018,China;Key Laboratory for Technology in Rural Water Management of Zhejiang Province,Hangzhou 310018,China;NARI Group Corporation(State Grid Electric Power Research Institute),Nanjing 211100,China;College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China)
出处
《水电能源科学》
北大核心
2022年第1期103-106,共4页
Water Resources and Power
基金
国家级大学生创新训练计划基金项目(201911481001,202011481001,202111841005)
浙江省新苗人才计划基金(2019R423005,2020R423001,2020R423001)
浙江省自然科学基金项目(LQ21D010001)
浙江省水利厅科研基金项目(RA1904,RB2022,RC2101)。
关键词
溢流坝
分道挑流结构
消能
冲刷
空化数
overflow dam
separated deflecting flow structure
energy dissipation
erosion
cavitation number
作者简介
励泽(1998-),男,硕士研究生,研究方向为水利水电工程设计,E-mail:1935451599@qq.com;通讯作者:秦鹏(1984-),男,博士、副教授,研究方向为新型水工建筑物设计与结构优化,E-mail:qp021625@163.com。
