Continuous radial sills for dissipating energy in a divergning stilling basin

Abstract EN

One of the most important protection works at the stilling basin outlets is the reduction of scour phenomenon and frequently the cost of the structure if a suitable appurtenances are developed to dissipate excessive energy and to establish safe flow conditions in outlet channels.

The present paper deals with the establishment of the criterion for the performance of three different of continuous radial sills and for the efficiency of their locations, heights and shapes in contributing in energy dissipation in diverging stilling basin.

This is evaluated by the stability conditions of the movable bed downstream of the sills.

Moreover, the results were illustrated by a number of graphical presentations based on a series of experimental studies.

According to the scour parameters, the laboratory study showed that the various radial sills were generally reduced the exess energy in the diverging stilling basin.

Also, the results indicated that the concave sill types were the best one in comparison to the sloping and convex sills.