摘要
竖井式溢洪道布置中竖井与明流隧洞衔接段的水力特性十分复杂,尤其在高水头运行条件下,衔接段复杂的水流流态会导致整个明流隧洞内水面持续波动,流态不稳,对明流隧洞段的结构安全造成严峻考验。文章提出了一种有利于改善衔接段水流流态的矩形压气板布置方案,并通过水工物理模型试验进行研究。结果表明,矩形压气板体型对明流隧洞内的流态控制相对较好,可有效避免水流冲顶现象,且相较于无压板体型,矩形压气板体型下水跃高度增加了约9%,水面波动范围缩短约15%,充分发挥消力井消能作用的同时抑制明流隧洞水面波动,使更快达到平稳状态,有利于工程安全。研究成果具有重要的推广应用价值。
The hydraulic characteristics of the interface section between the shaft and the open flow tunnel in the shaft-type spillway arrangement are very complex,especially under high head operating conditions,the complex flow pattern of the interface section will lead to continuous fluctuation of the water surface and unstable flow pattern in the whole open flow tunnel,which will cause a severe test to the structural safety of the open flow tunnel section.In this paper,a rectangular pressure plate arrangement scheme is proposed to improve the flow pattern of the articulated section,and is studied by means of a hydraulic physical model test.The results show that the rectangular pressure plate type has relatively good control of the flow pattern in the open flow tunnel,which can effectively avoid the phenomenon of water rushing to the top,and compared with the non-pressure plate type,the height of the water leap under the rectangular pressure plate type increases by about 9%,and the range of water surface fluctuation is shortened by about 15%.The research results have important promotion and application value.
作者
高翔
高轩
张振伟
李广宁
秦楠
王丽娟
孙双科
GAO Xiang;GAO Xuan;ZHANG Zhenwei;LI Guangning;QIN Nan;WANG Lijuan;SUN Shuangke(Baoding Yixian Pumped Storage Co.,Ltd.,Baoding 074200,Hebei,China;China Institute of Water Resources and Hydropower Research,Beijing 100038,China;China Electric Power Construction Group Beijing Survey and Design Research Institute Co.,Ltd.,Beijing 100024,China;College of Water Conservancy and Environment,Jinan 250022,Shandong,China)
出处
《水利水电技术（中英文）》
北大核心
2022年第S02期249-254,共6页
Water Resources and Hydropower Engineering
关键词
竖井
溢洪道
压气板
试验
流态
shaft
spillway
pressure plate
test
flow pattern
