Optimization of Spillway Tunnel Bucket and River Erosion Experiment
The spillway of a hydropower station intersects diagonally with the downstream river channel,and the distance between the flip bucket and the right bank slope of the river channel is relatively close.Using a conventional forward flip bucket will generate small flow drop,and large flow will impact the bank,endangering the foundation of the flip bucket and the stability of the right bank slope.Based on this,this study establishes a hydraulic model with a scale of 1:35 to study a new type of flip bucket structure suitable for the oblique intersection of flood discharge cavities and river channels,and the layout of flood discharge outlets near the right bank slope.The experimental results show that the inclined nose bucket has a better effect on solving the serious problem of scouring on the right bank slope.Whether it is in the case of frequent floods or low frequency floods,the right arc wall of the inclined nose bucket flips the water flow and guides it towards the middle of the riverbed,vertically stretching it significantly.The water tongue landing point is far away from the right bank slope,which is beneficial for energy dissipation and erosion prevention in downstream rivers.This study has reference significance for the selection of nose shaped ridges with similar terrains in actual hydraulic projects.
dissipation and anti-erosionflip bucketmodel experimentationtongue-shaped spillway bucketinclined spillway bucket
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