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	阶梯-深潭系统消能机理的实验研究
	李文哲 ; 王兆印 ; 李志威 ; 张晨笛 ; 吕立群 ; LI Wen-zhe ; WANG Zhao-yin ; LI Zhi-wei ; ZHANG Chen-di ; L�Li-qun
	2016-03-30 ; 2016-03-30
关键词	阶梯-深潭系统 消能机理 能量转化 消能率 step-pool system energy dissipation mechanism energy transfer energy dissipation ratio TV135.2
其他题名	Experiments on energy dissipation mechanism of step-pool system
中文摘要	阶梯-深潭系统能稳定河床、控制下切以及减小山洪泥石流灾害,其原因在于能高效消耗水流能量。通过野外实验,研究了不同流量下消能率变化规律,分析了水流沿阶梯-深潭能量转化过程,探讨了阶梯-深潭中能量的消耗机理。实验工况下(单宽流量5~210 L/s)阶梯-深潭具有很高的消能率(64%~91%),按部位其消能可分为阶梯消能和深潭消能,推导得到的消能率计算公式计算值和实测数据符合较好。在不同流量下阶梯消能方式因水流形态的改变有所不同,深潭消能可分为3个区域:水跃主流区、主流区两侧的两个大尺度漩涡区和主流区与周围区域交界的区域,它们的消能方式各有不同。当流量较小时,阶梯-深潭系统消能主要由阶梯段完成。流量增加后,阶梯段消能所占比例减小,深潭消能作用增强。; Step-pool system dissipates energy efficiently,therefore it could stabilize riverbed,control chan-nel incision and reduce mountainous natural disasters(e.g. landslide and debris flow). The energy dissipa-tion ratio under 6 experiment conditions(5~210 L/s) was studied through field experiment. A formula forcalculation of energy dissipation ratio was deduced based on the research achievements of predecessors onthe stepped spillway,plunge pool and hydraulic jump,the calculated values of the formula were accordedwith the measuring values well. The total energy dissipation zone was divided with step dissipation zoneand pool dissipation zone. The step dissipation ratio varied rapidly with flow regime changing. The pool dis-sipation zone could be divided into three parts:hydraulic jump region,whirlpool region and the boundarysection of the former two regions. The step played a more important role in energy dissipation under smalldischarge than the pool. As the discharge increased,the pool dissipated more energy than the step,andthe step-pool system maintained high energy dissipation ratio in high discharge.
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://ir.lib.tsinghua.edu.cn/ir/item.do?handle=123456789/148696]
专题	清华大学
推荐引用方式 GB/T 7714	李文哲,王兆印,李志威,等. 阶梯-深潭系统消能机理的实验研究[J],2016, 2016.
APA	李文哲.,王兆印.,李志威.,张晨笛.,吕立群.,...&L�Li-qun.(2016).阶梯-深潭系统消能机理的实验研究..
MLA	李文哲,et al."阶梯-深潭系统消能机理的实验研究".(2016).

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