狭窄河道小交角溢洪道燕尾坎挑流消能研究  

Study on Energy Dissipation of Swallow-tail Flip Bucket in Small Crossing Angle Spillway of Narrow River

作　　者：郭红民[1] 康文博 王晓军 郭佳 康建军 GUO Hong-min;KANG Wen-bo;WANG Xiao-jun;GUO Jia;KANG Jian-jun(College of Hydraulic and Environmental Engineering,China Three Gorges University,Yichang 443002,China;China Huashui Hydropower Development Company Limited,Chengdu 610000,China)

机构地区：[1]三峡大学水利与环境学院,湖北宜昌443002 [2]中国华水水电开发有限公司,四川成都610000

出　　处：《水电能源科学》2024年第1期125-128,124,共5页Water Resources and Power

摘　　要：狭窄河道小交角溢洪道挑流空间有限,流量变化大时挑流落点不稳定。为研究这种特殊地形下燕尾挑坎消能效果,依托某实际工程,采用数值模拟的方法拟定多种燕尾挑坎方案,研究了在狭窄河道小交角溢洪道条件下燕尾桃坎的消能效果。结果表明,方案2消能效果最优,当开口与燕尾宽度比为1且开口与溢洪道宽度比为0.5时水舌掺气效果最好,水流入水前能削减更大流速,在满足起挑前提下增大跌坎角度有利于水舌纵向拉伸,提高消能利用空间。最后复核了该方案在不同梯级流量时的消能冲刷情况,发现方案2挑坎在小流量和大流量泄洪时水舌落点依然稳定,冲坑对建筑物不构成安全威胁。The space of ski-jump small crossing angle narrow channel spillway is limited.Ski-jump is instability when discharge changes greatly.In order to study the energy dissipation effect of swallow-tail flip bucket under this special terrain,based on an actual project,a variety of swallow-tail flip bucket modes are given by numerical simulation.The results show that the second scheme has the best energy dissipation effect.When the opening width and the ratio of swallow-tail width is 1 and the ratio of opening to spillway width is 0.5,the aeration effect of water tongue is the best.The water flow can be killed more energy in the air and the water flow velocity is lower.On the premise of satisfying the lifting,increasing the angle of falling sill is beneficial to increase the longitudinal stretching of water tongue.It can improve energy dissipation and utilization space.Energy dissipation scouring in this scheme is rechecked under different cascade discharge.In the second scheme,the drop point of flip bucket is still stable when the discharge is small or large.Scouring does not pose a safety threat to buildings.

关 键 词：燕尾挑坎 溢洪道 狭窄河道 冲刷 数值模拟 

分 类 号：TV651.1[水利工程—水利水电工程] TV135.2