摘要
通过水工模型试验,研究跌扩型底流消能工进口接扩散角为3°的扩散式泄槽,在不同跌坎深度、不同边墙突扩宽度的组合下,其消能工内临底流速、时均压强、脉动压强方差值以及尾水渠水流流态的变化情况。结果表明:当跌坎深度由0.05 m增加到0.10 m,边墙突扩宽度由0.30 m增加到0.35 m时,消力池内临底流速降低、时均压强逐渐回升,尾水渠水流较为平顺。进一步增大跌坎深度和边墙突扩宽度,消力池内水力特性和出口水流流态虽继续改善,但效果已不明显。
Through hydraulic model test,this paper studies on the change of inner bottom flow rate,mean pressure,fluctuating pressure variance and tailwater channel flow pattern of energy dissipator under different combinations of falling-sill depth and sudden-expansion side wall width when the inlet of falling-sill and expanding bottom-flow energy dissipator is connected with the diffusion chute with diffusion angle of 3°.The results show that when the falling-sill depth increases from 0.05 m to 0.10 m,the sudden-expansion side wall width increases from 0.30 m to 0.35 m,and for the stilling basin,the inner bottom flow rate decreases,the mean pressure rises gradually,and the flow in the tailwater channel is relatively smooth.By further increasing the falling-sill depth and sudden expansion side wall width,the hydraulic characteristics and the pattern of the outlet flow continues to improve,but the effect is not obvious.
作者
周鑫宇
邱勇
阮合春
李鑫
余远浩
ZHOU Xinyu;QIU Yong;RUAN Hechun;LI Xin;YU Yuanhao(School of Water Conservancy,Yunnan Agricultural University,Kunming 650201,China)
出处
《人民珠江》
2019年第11期21-27,共7页
Pearl River
基金
国家级大学生创新创业训练计划项目(201710676008)
关键词
水力特性
水流流态
跌坎
突扩边墙
扩散式泄槽底流消能
hydraulic characteristics
flow pattern
falling sill
sudden-expansion side wall
bottom-flow energy dissipation of diffusion chute