含沙量对坡面流水动力学特性的影响研究
文献类型：期刊论文
| 作者 | 赵春红 ; 高建恩 ; 王飞 ; 张通 ; 张梦杰 |
| 刊名 | 农业机械学报
 |
| 出版日期 | 2013 |
| 卷号 | 44期号:09页码:79-07 |
| 关键词 | 土壤侵蚀 含沙量 Soil erosion Sediment load Overland flow Hydrodynamic characteristics 坡面流 水动力学特性 |
| 其他题名 | Effects of Sediment Load on Hydrodynamic Characteristics of Overland Flow |
| 中文摘要 | 基于系列室内水槽冲刷试验,定量研究了在9°坡度、不同流量条件下含沙量对坡面流水动力学参数的影响。结果表明:随含沙量增加,水流雷诺数Re减小,水流紊动强度减弱。弗劳德数、水流流速及流速修正系数α随含沙量增加先呈减小趋势,当含沙量S>300 kg/m3时,各值均突然增大,并随含沙量的进一步增加趋于稳定,表明此时水流型态发生变化,α均值为0.554。含沙水流和清水水流能量损失比较标准不同,得到的结论也不相同。当S<300 kg/m3时,以相同Re或相同单宽流量作为比较标准,含沙水流阻力系数均大于清水对应值;当S>300 kg/m3时,以相同的Re作为比较标准,则含沙水流阻力系数小于清水对应值,以相同的单宽流量作为比较标准,则含沙水流阻力系数大于清水对应值 |
| 英文摘要 | The potential effects of sediment load ( S) on hydrodynamic parameters of overland flow were investigated in a smooth plexi-glass flume under a wider range of sediment load and slope gradient of 9°． The results showed that Ｒeynolds number ( Ｒe) decreased as sediment load increased，implying a decrease in flow turbulence． Froude number，mean flow velocity and correction factor to flow velocity ( α) first all decreased with sediment load increasing and then the values all suddenly increased and gradually become stable as sediment load further increased when S ＞ 300 kg /m3 ． The mean α was 0. 554． For the difference between standard of energy dissipation in sediment-laden and clear-water overland flow，the conclusions were also different． When S ＜ 300 kg /m3，the friction coefficient of sediment-laden flow was larger than that of clear water flow either with the same Ｒeynolds number or unit flow rate as standard． While，when S ＞ 300 kg /m3，the friction coefficient of sediment-laden flow was smaller than that of clear water flow with the same Ｒeynolds number and larger with the same unit flow rate． |
| 语种 | 中文 |
| 公开日期 | 2014-10-20 |
| 源URL | [http://ir.iswc.ac.cn/handle/361005/5549]  |
| 专题 | 水土保持研究所_水保所知识产出(1956-2013) |
| 推荐引用方式 GB/T 7714 | 赵春红,高建恩,王飞,等. 含沙量对坡面流水动力学特性的影响研究[J]. 农业机械学报,2013,44(09):79-07. |
| APA | 赵春红,高建恩,王飞,张通,&张梦杰.(2013).含沙量对坡面流水动力学特性的影响研究.农业机械学报,44(09),79-07. |
| MLA | 赵春红,et al."含沙量对坡面流水动力学特性的影响研究".农业机械学报 44.09(2013):79-07. |
入库方式： OAI收割
来源：水土保持研究所
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