Behaviour of flow in a channel bend with a side overflow (flood relief) channel
Behaviour of flow in a channel bend with a side overflow (flood relief) channel
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带有侧溢流（防洪）渠道的渠道弯曲处的水流行为
DOI：
10.1080/00221689309498833
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发表时间：
1993
影响因子：
2.3
通讯作者：
J. Herbertson
中科院分区：
文献类型：
--
作者：
Y. Fares;J. Herbertson
报告了通过实验研究在通道弯曲部外侧引入侧溢流通道的效果所获得的结果。溢流通道的入口由宽阔的有顶侧堰控制。对仅弯道和主动溢流条件下的弯道之间的水面剖面、深度平均速度和水平合成速度的偏差角进行了比较。结果发现，在低溢流率（即中等到高堰顶水平）的条件下，流动特性实际上与仅弯曲情况相同。然而，当堰顶水位较低至中等时，堰段上游、沿线和下游发生了显着变化。具体地，在堰的上游端形成分离区，在通道弯曲部的内侧形成滞流区。
A report is given of the results obtained from an experimental investigation into the effects of introducing a side overflow channel on the outer side of a channel bend. Entry to the overflow channel was controlled by a broad crested side weir. Comparisons are made of water surface profiles, depth-averaged velocities and deviation angles of the horizontal resultant velocities between bend only and bend with active overflow conditions. It was found that under conditions of low overflow rates, i.e. medium to high weir crest levels, the flow characteristics were virtually the same as for the bend only situation. However with low to medium weir crest levels, significant changes occurred upstream of, along and downstream of the weir section. In particular, a separation zone formed at the upstream end of the weir and a stagnation zone on the inner side of the channel bend.