Flow choking over weir flow slit-type flip buckets

The flow choking may occur for weir flow slit-type flip buckets under common operation conditions. An estimation method is developed through introducing a comprehensive coefficient to determine the approach flow Froude number for the flow choking to occur in those flip buckets. The error of the pres...

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Bibliographic Details
Published in:Journal of hydrodynamics. Series B 2015-12, Vol.27 (6), p.907-912
Main Author: 马飞 徐准 吴建华
Format: Article
Language:English
Subjects:
dynamic pressure
Engineering
Engineering Fluid Dynamics
flow choking
Hydrology/Water Resources
jet trajectory
Numerical and Computational Physics
Simulation
slit-type flip bucket
weir flow
估计方法
堰流
弗劳德数
操作条件
溢流
狭缝式
综合系数
翻斗
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Summary:The flow choking may occur for weir flow slit-type flip buckets under common operation conditions. An estimation method is developed through introducing a comprehensive coefficient to determine the approach flow Froude number for the flow choking to occur in those flip buckets. The error of the present method relative to the experimental data is less than 5%. The results show that, the Froude number for the flow choking to occur is related to the contraction ratio and the contraction angle of the flip buckets. When the flow choking occurs, the upper jet trajectory decreases and the lower one is almost not affected, and the dynamic pressures on the bottom and the sidewalls increase due to the flow profile rising on the flip buckets.
ISSN:1001-6058
1878-0342
DOI:10.1016/S1001-6058(15)60553-4