摘要
通过定床阻力试验,从水力学原理出发,对3种不同坡度(坡度分别为:5°、10°、15°)有机玻璃床面和人工粗糙床面(床面粘贴砂粒粒径分别为:0.5~1、1~2、2~5、5~10mm)的侵蚀性坡面流试验数据进行分析,研究了侵蚀性坡面流流态,得出了侵蚀性坡面流存在"虚拟层流"、过渡流和紊流3种流态形式,通过试验分析了"虚拟层流"具有悬移输沙能力的原因。
Through the fixed-bed resistance test and from the principles of hydraulics, the erosive overland flow testing data of organic glass slippery bed and artificial rough bed (grain size of bed sticky sediment is 0.5-1 millimiter,1-5 millimeter,2-5 millimeter,5-10 millimeter) with three kinds of gradient (gradient is: 5°,10°,15°) under the condition are analyzed, and the flow pattern of erosive overland flow is researched. The results show erosive overland flow have virtual laminar flow, transitional flow and turbulent flow three kinds of flow pattern. The reason that virtual laminar flow had movement sediment transport capacity was explained.
出处
《灌溉排水学报》
CSCD
北大核心
2008年第2期82-85,共4页
Journal of Irrigation and Drainage
基金
黄土高原土壤侵蚀与旱地农业国家重点实验室开放基金(10501-141)
关键词
坡面流
流态
雷诺数
虚拟层流
过渡流
紊流
erosive overland flow
flow pattern
Reynolds number
virtual laminar flow
transitional flow
turbulent flow