水力发电学报2025，Vol.44Issue(11)：57-65,9.DOI:10.11660/slfdxb.20251106
低含沙量条件下的明渠交汇区水流特性研究
Experimental study on influence of sediment concentration on flow characteristics of open channel confluences
摘要
Abstract
The confluence area of rivers,as a key component of river systems,features complicated hydrodynamics and three-dimensional changes in bed morphology.This study conducts a laboratory water tank experiment of a river confluence and examines the distribution characteristics of its water flow under the condition of low sediment concentration.Four concentration conditions are tested,flow velocity is measured using an Acoustic Doppler Velocimeter(ADV),and the data is denoised.Results show that with an increasing concentration,velocity zoning characteristics in the confluence vary significantly,and the ranges of the flow velocity gradient and the maximum-velocity-covered area are both expanded.This means the dynamic behaviors of fluid and the interactions between fluid layers are enhanced.We also found that in the concentration range of 4.2 to 7.4 kg/m3,the inhibitory effect of sediment on turbulence is insignificant.The results lay an important basis for a deeper understanding of the hydrodynamic process and sediment transport in a river confluence.关键词
明渠交汇/含沙量/水流特性/ADV/水槽试验Key words
confluence of open channels/sediment concentration/water flow characteristics/ADV/flume experiment分类
水利科学引用本文复制引用
吴亨,王添,程圣东,李占斌,柯刚刚,甄贇哲..低含沙量条件下的明渠交汇区水流特性研究[J].水力发电学报,2025,44(11):57-65,9.基金项目
国家重点研发计划(2022YFF1300801) （2022YFF1300801）
西安理工大学博士创新基金项目(104-252072304) （104-252072304）
