消力坎对跌坎消力池坎控水跃影响的试验研究  

Experimental Study on the Influence of Stilling Sill on the Sill-control Hydraulic Jump of Stilling Basin with Drop Sill

作　　者：郭川靖 蒋雷[1] 刁明军[1] GUO Chuanjing;JIANG Lei;DIAO Mingjun(State Key Laboratory of Hydraulics and Mountain River Engineering of Sichuan University,Chengdu Sichuan 610065)

机构地区：[1]四川大学山区河流保护与治理全国重点实验室,四川成都610065

出　　处：《四川水力发电》2024年第2期120-127,共8页Sichuan Hydropower

摘　　要：跌坎消力池的设计一直是水利工程领域的热点问题,设计合理的消力池可以保证在短距离内有相当大的消能。笔者通过模型试验研究了跌坎消力池中不同高度和不同位置的消力坎对坎控水跃的影响,并与不加消力坎时消力池内相同水跃流态进行对比。结果表明:增设消力坎可有效缩短越长,减小共轭水深比,增大水跃消能率。随着消力坎距跃首距离的减小或者消力坎高度的增加,消力坎在减小水跃长、共轭水深比,增大消能率方面的作用越来越大。同时经过无量纲分析得出了消力坎设置在不同位置和高度条件下,相对水跃长度、共轭水深比和消能率的经验公式。该研究结果可为类似水工建筑物的设计提供参考。The design of stilling basin with a drop sill has always been a hot issue in the field of water conservancy projects.A reasonable design of stilling basin can ensure considerable energy dissipation in a short distance.In this paper,the influence of different heights and different positions of sills on the hydraulic jump in the stilling basin is studied by model tests,and compared with the same hydraulic jump in the stilling basin without the sill.The results show that the addition of the sill can effectively shorten the length,reduce the conjugate water depth ratio and increase the energy dissipation rate of hydraulic jump.With the decrease of the distance between the sill and the jump head or the increase of the height of the sill,the sill plays an increasingly important role in reducing the hydraulic jump length,the conjugate water depth ratio and increasing the energy dissipation rate.At the same time,the empirical formulas of relative hydraulic jump length,conjugate water depth ratio and energy dissipation rate are obtained by dimensionless analysis under different positions and height conditions.The research results can provide reference for the design of similar hydraulic structures.

关 键 词：水跃 消力坎 跌坎消力池 模型试验 

分 类 号：TV653[水利工程—水利水电工程] TV149.2