断面形态对支流分流比的影响研究  

Research on Division Ratio of Tributary of Different Cross-sections Shapes

作　　者：邹健 李涛[2,3] 曲少军[2] 王玮[4] ZOU Jian;LI Tao;QU Shao-jun;WANG Wei(School of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou 450045, China;Research Center of Xiaolangdi, Yellow River Institute of Hydraulic Research, YRCC, Zhengzhou 450003, China;State Key Laboratory of Water Resources and Hydropower Engineering, Wuhan University, Wuhan 430072, China;The Tourism Development Limited Company of Xiaolangdi, Luoyang 471141, Henan Province, China)

机构地区：[1]华北水利水电大学水利学院,郑州450045 [2]黄河水利科学研究院黄河小浪底研究中心,郑州450003 [3]武汉大学水资源与水沙科学国家重点实验室,武汉430072 [4]黄河小浪底旅游开发有限公司,河南洛阳471141

出　　处：《中国农村水利水电》2018年第6期136-139,144,共5页China Rural Water and Hydropower

基　　金："十三五"国家重点研发计划项目(2017YFC0405505);国家自然科学基金项目(51679103;51309110;51509100;51509103);黄河水利科学研究院院所长基金项目(HKY-JBYW-2018-02)

摘　　要：明渠侧向取水受取水口门形态的约束,水流流态紊乱,对支渠引水影响很大。对此采用Mike21数值模拟手段模拟3种边坡系数分别为0、1、2的断面在流量1~10 L/s下的水流运动,分析分流口门处的流态,研究各参数对分流比的影响。研究结果表明:相同边坡系数,随着上游来流流量的增加,回流区范围增大,有效宽度减小,收缩系数减小,分流比减小;相同流量,随着边坡系数的增大,支流内回流区范围变小,有效宽度增加,收缩系数增大,分流比增大;随着弗劳德数的增加,分流比逐渐减小,且边坡系数越大,变化越明显。最后获得了分流比与弗劳德数与收缩系数之间的关系式,相关度较好,并得到了验证。Lateral intakes in open channel are often used for diverting water from river,which has a great impact on the flow regime because of the constraint near the intake mouth. Those factors influence the branch ditch heavily. With the complicated regime in diversion of tributary,the simulation model was established to analyze hydraulic characteristics of bifurcation area based on MIKE21,a model for plane-2 D flow. The flow under three slope coefficients 0,1 and 2 respectively are simulated with discharge varying from 1 L/s to 10 L/s. The flow pattern at the entrance of the diversion and the influence of the parameters on the diversion ratio are analyzed and studied. The results show that,under the same slope coefficient,the range of recirculation zone increases,the effective width of branch decreases,the contraction coefficient decreases and the diversion ratio decreases with inlet discharge increasing. Under a fixed discharge,the range of recirculation zone decreases,the effective width of branch increases and the contraction coefficient and the diversion ratio increases with slope coefficients increasing. With Froude number increasing,the diversion ratio decreases gradually with larger the slope coefficient. The relationship among the diversion ratio and the Froude number and the contraction coefficient is obtained,the correlation coefficient is good and has been verified.

关 键 词：分流比 数值模拟 回流区 边坡系数 

分 类 号：TV131[水利工程—水力学及河流动力学]