摘要
窄缝挑坎消能工因其良好的消能效果和易施工的特点被广泛应用于工程中。笔者通过模型试验,对3种收缩比(η=0.2,0.25,0.3)情况下的单侧偏转的非对称窄缝挑坎的边墙水面线,底板中线时均压强和脉动压强特性展开了研究。试验结果表明:非对称窄缝挑坎的左右边墙水面线形态不同但均呈现上升趋势,窄缝底板中线上的时均压强和脉动压强均方根沿程增大,在接近窄缝出口处达到峰值,后减小。窄缝底板中线上的脉动压强基本符合标准正态分布。
Narrow slit ridges are widely used in engineering due to their excellent energy dissipation effect and easy construction characteristics.This article conducted a study on the characteristics of the water surface profile of the side wall and the pressure and pulsating pressure at the centerline of the bottom plate of an asymmetric slit-type bucket through model tests on three shrinkage ratios(η=0.2,0.25,and 0.3).The results showed that the water surface profiles of the left and right side walls of the asymmetric narrow slit ridges are different but show an upward trend.The time-averaged pressure and the root mean square of the pulsating pressure on the centerline of the narrow slit bottom plate increase along the path,reaching a peak near the exit of the narrow slot,and then decrease.The pulsating pressure on the centerline of the narrow slot bottom plate basically conforms to the standard normal distribution with no obvious.
作者
谢鑫
刁明军
杨思远
XIE Xin;DIAO Mingjun;YANG Siyuan(State Key Laboratory of Hydraulics and Mountain Rivers Engineering,Sichuan University,Chengdu Sichuan 610065)
出处
《四川水力发电》
2024年第1期1-5,共5页
Sichuan Hydropower
基金
四川省学术和技术带头人培养基金(2012DTY020)。
关键词
窄缝挑坎
非对称
脉动压强
消能工
Narow slit ridges
Asymmetric
Fluctuating pressure
Energy dissipator
