不同加糙方式对明渠水力要素的影响探究  

Influence of Different Roughening Methods on Hydraulic Factors

作　　者：杨会朋 张思佳[3] 田鹏伟 陈力晖 王志国[1,2] YANG Huipeng;ZHANG Sijia;TIAN Pengwei;CHEN Lihui;WANG Zhiguo(School of Water Conservancy and Hydropower,Hebei University of Engineering,Handan 056038,China;Hebei Key Laboratory of Intelligent Water Conservancy,Hebei University of Engineering,Handan 056038,China;BEIJING IWHR-KHL Co.,Ltd.,China Institute of Water Resources and Hydropower Research,Beijing 100038,China)

机构地区：[1]河北工程大学水利水电学院,河北邯郸056038 [2]河北工程大学河北省智慧水利重点实验室,河北邯郸056038 [3]中国水利水电科学研究院北京中水科海利工程技术有限公司,北京100038

出　　处：《人民黄河》2022年第4期132-135,共4页Yellow River

基　　金：国家重点研发计划项目(2017YFC0405004);河北省高等学校研究计划项目(ZD2015127)。

摘　　要：渠道糙率的变化会造成渠道各个水力要素产生相应的改变。通过对梯形渠道进行不同方式的加糙,并用电磁流速仪测量流速,分析在不同加糙方式下流速变化、不同形状的加糙形式对水流流速引起的变化以及糙率和各水力要素之间的关系。分析结果表明:当流量不变、加糙方式一定时,糙率随着设计水深的增大而增大;断面平均流速随着糙体间距的增大而增大;当流量不变、水深一定时,糙体布置间距越小,水流的纵向紊动强度越大;水深和糙体间距不变时,随着流量的增大,水流的纵向紊动强度增大,但变化不明显。The change of channel roughness will change each hydraulic element of the channel accordingly.In this paper,the trapezoidal channel was roughened in different ways,and the values were measured by electromagnetic current meter.The changes of velocity values un⁃der different roughening methods,the changes of flow velocity caused by different roughening forms,and the relationship between roughness value and various hydraulic factors were analyzed.The results show that the roughness increases with the increase of water depth when the flow is constant and the roughening mode is constant;the average velocity of cross section increases with the increase of roughness spacing;when the discharge is constant and the water depth is constant,the smaller the spacing of the roughness,the greater the longitudinal turbu⁃lence intensity of the flow;when the water depth and the distance between roughness bodies remain unchanged,the longitudinal turbulence intensity will increase with the increase of flow,but the change is not obvious.

关 键 词：加糙方式 断面平均流速 糙率 紊动强度 

分 类 号：TV68[水利工程—水利水电工程]