对称三角薄壁折线堰的泄流能力研究  

Study of discharge capacity of symmetric triangular thin-walled polyline weir

作　　者：易晨立 杨校礼[1] 吴凯 方陈卓 袁辰扬 YI Chenli;YANG Xiaoli;WU Kai;FANG Chenzhuo;YUAN Chenyang(College of Water Conservancy&Hydropower Engineering,Hohai University,Nanjing 210098,China;Wuxi City Xishan District Ehu town water conservancy management station,Wuxi 214000,China)

机构地区：[1]河海大学水利水电学院,江苏南京210098 [2]无锡市锡山区鹅湖镇水利管理站,江苏无锡214000

出　　处：《中国水利水电科学研究院学报(中英文)》2025年第1期66-72,共7页Journal of China Institute of Water Resources and Hydropower Research

基　　金：国家自然科学基金项目(52379061);江苏省自然科学基金项目(BK20230099)。

摘　　要：近年来由于工程实际的需要,各种型式的折线堰在水利工程中的应用逐渐增多。在众多折线堰型中,三角形折线堰最为基础又研究较少,因此本文以平面上的对称三角形薄壁折线堰这一基本堰型为例,在因次分析的基础上,结合物理模型试验分析了凹型和凸型两种典型堰型流态特征与过堰水流泄流影响机理,重点研究了关键参数堰轴夹角和相对溢流前缘宽度对泄流能力的影响。研究结果表明,两类典型折线堰的过堰水流呈现出不同的特殊流态,导致其对泄流能力的影响也不尽相同。本文寻求了所研究关键参数之间的相关性,并发现在河谷宽度一定条件下,堰轴夹角θ=π3有较好泄流效果。Recently,due to practical engineering needs,the application of various types of polyline weir in water conservancy projects has gradually increased.Among many polyline types,triangular polyline is the most basic and rarely studied.Therefore the basic weir type of symmetrical triangular thin-wall polyline weir is taken as an example in this paper.On the basis of dimensional analysis and physical model researches,flow characteristics of two typical weir types,concave and convex,and mechanism of weir flow are analyzed.We focused on the influence of key parameters such as weir shaft angle and the relative width of the overflow leading edge.The results show that the flow through the weir of the two types of typical polyline weirs presents different special flow patterns,resulting in different effects on the discharge capacity.The correlation between the key parameters studied is sought and it is found weir shaft angleθ=π3 has a better discharge effect under a given valley width.

关 键 词：薄壁折线堰 泄流能力 因次分析 堰轴夹角 相对溢流前缘宽度 

分 类 号：TV135.2[水利工程—水力学及河流动力学]