含多重刚性植被明渠水流特性实验研究  

Experimental Study on the Characteristics of Open Channel Flow with Multiple Rigid Vegetation

作　　者：宋滢汀 景何仿[1,3] 王维红 赵卫伟 李春光[1,3] SONG Yingting;JING Hefang;WANG Weihong;ZHAO Weiwei;LI Chunguang(Research Institute of Numerical Computation and Engineering Applications,North Minzu University,Yinchuan 750021,Ningxia,China;School of Mathematics and Information Science,North Minzu University,Yinchuan 750021,Ningxia,China;The Key Laboratory of Intelligent Information and Big Data Processing of Ningxia Province,North Minzu University,Yinchuan 750021,Ningxia,China)

机构地区：[1]北方民族大学数值计算与工程应用研究所,宁夏银川750021 [2]北方民族大学数学与信息科学学院,宁夏银川750021 [3]北方民族大学宁夏智能信息与大数据国家重点实验室,宁夏银川750021

出　　处：《水力发电》2020年第11期125-130,共6页Water Power

基　　金：北方民族大学校级重点科研项目(2019KJ125);国家自然科学基金(11861003;11761005);宁夏自治区科学技术研究重点研发计划项目(2019BEG-03048);宁夏西部一流学科建设(数学学科)(NXYLXK2017B09);北方民族大学研究生创新项目(YCX20095).

摘　　要：水流环境中的植被会对水流结构产生影响,进而影响泥沙运移和水质等物理量。为此,在流体力学实验室水槽中开展了系列实验,用不同高度玻璃棒代替刚性植被,利用三维激光多普勒测速仪(3D-LDV)对含不同高度组合的多重植被的水流流速、水位和紊流强度等物理量进行测量。根据植被重数分单重植被、双重植被和三重植被3个工况,每个工况又根据淹没度不同分3个子工况。通过对比分析实测结果,得到了含多重植被水流运动的水力学规律。研究结果对河流、水库和湖泊管理具有一定的参考价值。The vegetation in water flow environment will affect the water flow structure,sediment transportation and water quality.In this study,a series of experiments have been conducted in a laboratory flume,in which the multiple rigid vegetation are replaced by glass rods with different heights,and the three-dimensional laser Doppler velocimeter(3D-LDV)is employed to measure the physical coefficients such as flow velocity,water level and turbulence intensity.In the experiments,three cases are chosen according to the number of vegetation heights,i.e.single vegetation,double vegetation and triple vegetation,and three sub-cases are designed according to the submergence degree of the vegetation for each case.Comparison and analysis are conducted for the measured data of water flow with multiple vegetation,and some conclusions are obtained,which are of great significance for the management of natural rivers,reservoirs and lakes.

关 键 词：多重植被 淹没度 激光多普勒测速仪 水流流速 紊流强度 

分 类 号：TV131.22[水利工程—水力学及河流动力学]