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	倒虹吸有压弯管的局部水头损失系数计算方法比较
	王开 ; 傅旭东 ; 王光谦 ; WANG Kai ; FU Xu-dong ; WANG Guang-qian
	2010-06-10 ; 2010-06-10
关键词	倒虹吸 有压弯管 局部水头损失 损失系数 inverted siphon pressure bend and elbow local head loss losses coefficient TV135
其他题名	Comparison with calculating the coefficient of local head loss models for inverted siphons
中文摘要	有压弯管局部水头损失计算在倒虹吸等过水建筑物设计中至关重要。其中,转弯角和转弯形式是影响局部水头损失系数取值的重要因素。本文通过比较分析典型的有压弯管局部水头损失系数计算公式,结合水工模型试验资料的验证,考察了不同计算公式的性能。对小转弯角(<20°)情形,分析了转弯半径和转弯形式对局部水头损失系数的影响。结果表明,转弯角小于17°时,折弯管的局部水头损失系数不大于圆形缓弯管,在低水头、大流量的输水工程的倒虹吸设计中可以考虑采用折弯管形式。; The calculation of local head loss in a pressured curved tube is very important for the design of the construction of inverted siphon.Among them mainly affected by geometric parameters including the angle of bend,the relative radius of curvature,and the aspect ratio of cross section.This paper presents verifications of existing local-head-loss models by using experimental data from physical models and analysis of the influence of tube geometries on the coefficient of local head loss.It shows that the coefficient of local head loss in elbows with sharp corners is not larger than that in bends in the case that the angle of bend is less than 17 degrees.Other conditions being equal,elbows with rounded corners offer smaller local head loss than elbows with sharp corners do.In the design of water diversion projects with low head and large discharge,elbows with sharp corners could be applied to inverted siphons for the convenience of construction and for the advantage of lower local head loss.; 国家重点基础研究发展计划(973)项目专项经费资助(编号:2005CB724202)
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/60073]
专题	清华大学
推荐引用方式 GB/T 7714	王开,傅旭东,王光谦,等. 倒虹吸有压弯管的局部水头损失系数计算方法比较[J],2010, 2010.
APA	王开,傅旭东,王光谦,WANG Kai,FU Xu-dong,&WANG Guang-qian.(2010).倒虹吸有压弯管的局部水头损失系数计算方法比较..
MLA	王开,et al."倒虹吸有压弯管的局部水头损失系数计算方法比较".(2010).

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