水利学报2018，Vol.49Issue(3)：353-361,9.DOI:10.13243/j.cnki.slxb.20170778
刚性淹没球冠状植被水流特性试验研究
Experiments on characteristics of open-channel flow through submerged rigid vegetation with ball-like canopy
摘要
Abstract
The tree-like canopy model,formed by crown and trunk,are conducted in laboratory flow experiments.MicroADV are used to study the flow characteristics influenced by vegetation with ball-like canopy in open channel.Flow condition varied in four cases,with different flow rate and water depth.Focusing on the mean velocity and turbulence structure,the vertical profiles of longitudinal velocity,vertical velocity and turbulence intensity were analyzed.The results show that the normalized longitudinal velocity increases as the water depth decreases.The longitudinal velocity is almost constant in the stem layer.It decreases firstly then increases with increment of depth in the canopy layer.Strong fluctuation of turbulence intensity is found in the canopy layer.The longitudinal velocity in no-canopy layer follows logarithmic law.The quadrant analysis recovers the canopy layer is the sweep-dominated area and no-canopy layer is the ejection-dominated area.关键词
树状刚性植被/Micro ADV/平均流速分布/紊动结构/象限分析Key words
rigid vegetation with ball-like canopy/MicroADV/mean velocity profile/turbulence structure/quadrant analysis分类
建筑与水利引用本文复制引用
赵芳,Aristotelis Mavrommatis,Anastasios Stamou,槐文信,杨中华..刚性淹没球冠状植被水流特性试验研究[J].水利学报,2018,49(3):353-361,9.基金项目
国家自然科学基金项目(51439007,11172218.11372232) （51439007,11172218.11372232）
