不同体型宽尾墩与跌坎消力池联合消能脉动压强实验研究  

Experimental Study on Pulsating Pressure in Combined Energy Dissipation of Different Types of Wide Tail Piers and Stilling Basin with Step-down Floor

作　　者：田中耀 杨思远[1] 金靖林 刁明军[1] TIAN Zhongyao;YANG Siyuan;JIN Jinglin;DIAO Mingjun(State Key Laboratory of Hydraulics and Mountain Rivers Engineering,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》2025年第1期118-124,共7页Sichuan Hydropower

摘　　要：不同体型宽尾墩与跌坎消力池联合消能目前研究较少,此类消能方式使消力池前段水流流态更加复杂,发生破坏的可能性较大,研究其脉动压强特性对宽尾墩体型设计具有参考作用。基于模型试验研究“X”型宽尾墩和“Y”型宽尾墩两种体型,6种来流情况下跌坎消力池及溢流堰反弧段的脉动压强特性。实验结果表明,在消力池前段“X”型宽尾墩时均压强总体小于“Y”型宽尾墩,在中后段逐渐趋于一致;脉动压强概率密度基本符合正态分布,存在正偏和负偏现象;消力池底板的脉动主要由10 Hz以内的低频脉动组成,不同体型,不同点位,不同来流只影响脉动能量大小,不影响脉动频率组成。Research on combined energy dissipation methods with different types of broad-tail piers and stilling basin is currently limited.This type of energy dissipation approach makes the flow pattern in the front section of the energy dissipation pool more complex,increasing the likelihood of damage.Investigating the pulsating pressure characteristics has reference value for the design of broad-tail pier shapes.Based on model tests,the pulsating pressure characteristics of two types of broad-tail piers(X-shaped and Y-shaped)in drop energy dissipation pools and the reverse curve section of overflow weirs under six inflow conditions were studied.The experimental results show that the average pressure is generally lower with X-shaped broad-tail piers than with Y-shaped broad-tail piers in the front section of the stilling basin,gradually converging in the middle and rear sections.The probability density of pulsating pressure approximately follows a normal distribution,with positive and negative skewness phenomena observed.The pulsation on the bottom plate of the energy dissipation pool is mainly composed of low-frequency pulsations below 10Hz,with different shapes,positions,and inflows affecting the pulsation energy magnitude but not the pulsation frequency composition.

关 键 词：宽尾墩 跌坎 消力池 脉动压强 

分 类 号：TV653.1[水利工程—水利水电工程] TV131.33