楔形过渡阶梯的溢流坝压强特性分析  

Analysis of Pressure Characteristics of Spillway Dam with Wedge Transition Step

作　　者：陈卫星 杨具瑞[2] 邱毅 任中成 CHEN Wei-xing;YANG Ju-rui;QIU Yi;REN Zhong-cheng(Lujiang Building Water Affairs Bureau,Hefei 231500,China;Faculty of Modern Agricultural Engineering,Kunming University of Science and Technology,Kunming 650500,China;Guangdong No.2 Hydropower Engineering Survey and Design Co.,Ltd,Foshan 528000,China;Zigong Water Conservancy and Electric Power Building Survey and Design Institute,Zigong 643000,China)

机构地区：[1]庐江县水务局,安徽合肥231500 [2]昆明理工大学现代农业工程学院,云南昆明650500 [3]广东粤水电勘测设计有限公司,广东佛山528000 [4]自贡市水利电力建筑勘测设计院,四川自贡643000

出　　处：《云南水力发电》2022年第11期59-63,共5页Yunnan Water Power

基　　金：国家自然科学基金(51569010)。

摘　　要：为研究楔形过渡阶梯对一体化消能工消能的影响,将溢流坝的前6级阶梯设计为过渡阶梯,将过渡阶梯设计为5°、10°和15°坡度的楔形过渡阶梯进行数值模拟研究。根据计算结果发现:水流从阶梯溢流坝过渡到反弧,时均压强增幅会有所减小;水流对一体化消能工的反弧末端造成的压力最大,且随着楔形阶梯坡度的增大,时均压强逐渐减小;时均压强最大值出现在反弧段末端,说明改变一体化消能工的反弧段结构,对其消能效果有显著的影响。In order to study the influence of wedge transition step on energy dissipation of integrated energy dissipator,the first 6 steps of spillway dam are designed as transition step and the transition step is designed as wedge transition step with gradients of 5,10 and 15 degrees for numerical simulation.According to the calculation results,it is found that when the water flow transits from the stepped spillway dam to ogee section,the increase of the average pressure will be reduced.The pressure at the end of ogee section caused by water flow is the maximum,and the pressure will decrease gradually with the increase of wedge step gradient.The maximum timeaveraged pressure occurs at the end of ogee section.It shows that changing the ogee section of the integrated energy dissipator has a significant influence on its energy dissipation effect.

关 键 词：数值模拟 楔形过渡阶梯 坡度 阶梯溢流坝 时均压强 反弧段 

分 类 号：TV131.6[水利工程—水力学及河流动力学]