水力发电2024，Vol.50Issue(1)：103-108,6.
含淹没柔性水生植被群的弯道水流特性PIV试验研究
PIV Experimental Study on Flow Characteristics of Bend Channel with Submerged Flexible Aquatic Vegetation Group
摘要
Abstract
The method of flume experiment is adopted to study the influence of submerged flexible aquatic vegetation on bend flow.In experiments same kind of plastic grass model vegetation group is arranged near 25° and 45° of the convex bank of U-shaped bend flume the vegetation density is set to be dense and sparse respectively and the automatic water level measurement system and particle image velocimetry (PIV) are used to measure the flow velocity and water level near the vegetation and in the U-shaped bend flume under different operating conditions respectively.Based on measurement results the influence of flexible aquatic vegetation with different density number of plants/m2 on water flow is studied and the water level change flow velocity distribution transverse gradient change head loss and hydraulic gradient are also analyzed.The experimental results show that (a) the flow velocity of each section (25° 45° 60° 90° 120° 150° 180°) on the convex bank of the bend decreases first and then tends to be stable under different vegetation densities; (b) on the concave bank the flow velocity of each section varies greatly under different vegetation densities and among them the flow velocity of the dense vegetation at the 60° section is smaller than that of the sparse vegetation while at the 150° section the flow velocity increases greatly and then decreases and is larger than that of sparse vegetation at the exit of the bend; and (c) the vegetation groups increase head loss and hydraulic gradient and the dense vegetation group has the greatest influence.关键词
柔性植被/粒子图像测速仪/U形弯道水槽/水流特性/影响Key words
fiexible vegetation/particle image velocimeter (PIV)/U-shaped curved flume/flow characteristics/influence分类
建筑与水利引用本文复制引用
陈吉爽,杨海鹏,景何仿,杨佳双,齐锦辉,白江洲..含淹没柔性水生植被群的弯道水流特性PIV试验研究[J].水力发电,2024,50(1):103-108,6.基金项目
国家自然科学基金资助项目(11861003) （11861003）
北方民族大学科学计算与工程应用创新团队(2022PT_S02) （2022PT_S02）
北方民族大学本科生创新项目(202211407011) （202211407011）
