文章基本信息

标题：HYDRAULICS OF ARCH PLAN LABYRINTH WEIRS WITH TWO DIFFERENT CYCLES
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作者：Behzad Zeraat ; Mohammad Heidarnejad ; Alireza Masjedi 等
期刊名称：Fresenius Environmental Bulletin
印刷版ISSN：1018-4619
出版年度：2017
卷号：26
期号：4
页码：2863-2868
语种：English
出版社：PSP Publishing
摘要：Labyrinth weirs are effective and economic solutions where there are width and water level limitations at the upstream of the weir construction site. Due to its increased crest length within a given width, a labyrinth weir can pass a higher flowrate through its zigzag section (at the same hydraulic load) compared to straight weirs. The main hypothesis in the development of weirs is that the discharge capacity over the weir can be increased by increasing the length of the crest within a given transverse distance. This study examines the discharge coefficient of single-cycle and double-cycle arch plan weirs under different hydraulic heads. The obtained results showed that increasing the weir hydraulic head (Hd/P) from 0.03 to 0.65 would decrease Cd by about 52%. In addition, the discharge coefficient in the double-cycle weir was considerably greater than that in the single-cycle weir, with the Cd in the former being 57% greater than that in the latter under the most favorable conditions.
关键词：Labyrinth weir;discharge coefficient/flowrate coefficient;cycle;discharge-scale curve