摘要
沙纹床面形态影响着水流阻力及河床的稳定性,是研究水沙运动规律的重要突破口。本文基于二维概化沙纹床面的水槽试验,利用声学多普勒流速仪(ADV)及染色液流态显示装置对沙纹床面近壁区的紊流特性和紊流结构进行测量,研究了沙纹床面形态与紊流特性的相关性。研究表明,沙纹形态与紊流特性密切相关,沙纹形态的尺度与紊流结构的尺度具有相似性。
The ripple bed pattern affects the water flow resistance and the stability of the river bed,which is an important breakthrough in the study of the law of water and sediment movement.Based on the flume experiment on two-dimensional generalized ripple bed,the turbulence flow characteristics and turbulence structure of the ripple bed near the wall are measured by using the Acoustic Doppler Velocimetry(ADV)and the dyeing liquid flow visualization device,and the correlation between the ripple bed pattern and turbulence flow characteristics is studied.The research shows that the ripple bed patter is closely related to the turbulence flow characteristics,and the scale of the ripple pattern is similar to the scale of the turbulence structure.
作者
孙会东
唐立模
刘全帅
SUN Huidong;TANG Limo;LIU Quanshuai(Liaoning Water Conservancy and Hydropower Survey and Design Institute Co.,Ltd.,Shenyang 110006,China;College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210024,China)
出处
《水利建设与管理》
2023年第3期35-41,48,共8页
Water Conservancy Construction and Management
基金
国家自然科学基金项目(No.51479070)。
关键词
沙纹形态
紊动强度
紊动猝发周期
雷诺应力
相关性分析
ripple pattern
turbulence intensity
turbulence burst period
reynolds stress
correlation analysis
