含沙量对坡面流水动力学特性的影响研究

CORC > 水土保持研究所 > 中国科学院水利部水土保持研究所 > 水保所知识产出(1956-2013)

	含沙量对坡面流水动力学特性的影响研究
	赵春红 ; 高建恩 ; 王飞 ; 张通 ; 张梦杰
刊名	农业机械学报
	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
内容类型	期刊论文
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.