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首页> 外文期刊>Canadian Water Resources Journal >'Brink Depth-Discharge' Relationship for Spatially-Varied Flows in Pipes
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'Brink Depth-Discharge' Relationship for Spatially-Varied Flows in Pipes

机译:管道中空间变化流量的“边缘深度-流量”关系

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摘要

In view of the self-calibrating feature, the 'brink' depth generated at the entrance to a freely-discharging 'drop' structure in a prismatic open channel is widely used for estimating channel discharge. Laboratory investigations on this subject have been performed for both sub-critical and super-critical flows in different—shaped prismatic channels. However, these studies have examined the 'brink depth-discharge' relationship for constant channel flow conditions only. This research investigates the brink depth-discharge relationship for circular pipes carrying sub-critical spatially-varied flows (SVF) with discharge increasing in the flow direction. Results indicate that for this type of SVF the brink ratio (BR) is: (ⅰ) closer to unity than that for constant discharge, and (ⅱ) offers reasonable accuracy in regards to estimating SVF in a circular pipe section.
机译:考虑到自校准功能,在棱柱形明渠中自由排放的“液滴”结构的入口处产生的“暗淡”深度被广泛用于估计通道的排放量。已经针对不同形状的棱柱形通道中的次临界和超临界流进行了实验室研究。但是,这些研究仅检查了恒定通道流动条件下的“边缘深度-流量”关系。本研究研究了带有亚临界空间可变流量(SVF)且流量沿流动方向增加的圆形管道的边缘深度-排放关系。结果表明,对于这种类型的SVF,其折边率(BR)为:(ⅰ)比恒定排放量的折边率更接近统一,并且(ⅱ)在估算圆形管道截面中的SVF方面具有合理的准确性。

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