| 薄层水流水力特性试验研究 |
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| 引用本文： | 杨锦,吕宏兴,上官周平.薄层水流水力特性试验研究[J].灌溉排水学报,2008,27(4). |
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| 作者姓名： | 杨锦 吕宏兴 上官周平 |
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| 作者单位： | 1. 西北农林科技大学 水利与建筑工程学院,陕西 杨凌,712100
2. 中国科学院 水土保持研究所,陕西杨凌,712100 |
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| 摘 要： | 对粘砂床面的薄层水流进行定床试验,研究了不同流量、坡度下薄层水流的水力学参数(流态、水深、流速及阻力系数)随坡度和流量的变化规律。结果表明:水流雷诺数Re随着坡度和流量的增大而增大,但Re主要是由流量决定的,坡度对Re的影响不大,水流流态基本上在过渡流区和紊流区;平均水深-单宽流量,流速-单宽流量,水流阻力系数-单宽流量均成很好的幂函数形式,平均水深和流速均随单宽流量的增大而增大,阻力系数随着单宽流量的增大而减小。
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| 关 键 词： | 薄层水流 水力特性 阻力系数 流速 |
Experiment Study on Hydraulic Properties of Overland Flow |
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| YANG Jin,LV Hong-xing,SHANGGUAN Zhou-ping.Experiment Study on Hydraulic Properties of Overland Flow[J].Journal of Irrigation and Drainage,2008,27(4). |
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| Authors: | YANG Jin LV Hong-xing SHANGGUAN Zhou-ping |
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| Institution: | YANG Jin1,LV Hong-xing1,SHANGGUAN Zhou-ping2 (1.College of Water Resources , Architectural Engineering,Northwest Agriculture & Forestry University,Yangling 712100,China,2.Institute of Soil , Water Conservation,CAS,China) |
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| Abstract: | Based on indoor fixed-bed experiment of overland flow,the relationships between hydraulic properties(Reynolds number,flow velocity,water depth and resistance coefficient) and discharge,slope gradient is examined by simulating in a resistant flume,on which a kind of sand(1~2 mm) was fixed.The results show that: ①the Re number of overland flow increase with the increasing of discharge and slope gradient.However,the effect of discharge is more greater than that of slope gradient.②the average velocity and water depth increase with the increasing of discharge.Resistance coefficient decrease with the increasing of discharge. |
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| Keywords: | overland flow hydraulic properties resistance coefficient water velocity |
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