EXPERIMENTAL STUDY OF SKI-JUMP BUCKET

Abstract

'SKI-JUMP BUCKET' is an energy dissipation device usually provided downstream of the spillway. The device is suitable for condition of deficient tail water level and appropriate hard rock strata at the downstream of the spillway structure. The flow - characteristics downstream of three ski-jump bucket models have been studied for the present investigation. The velocity distribution along the centre line of the channel have been measured. Besides velocity distributions, shear stress characteristics along the centre line of the channel bed have been measured with the help of Preston tube. Also, profile of the trajectory has been examined under submerged and free flow conditions. The critical depth at which the trajectory gets submerged has also been obtained. The data collected during the experimental work have been analysed to arrive at some meaningful relations and conclusions in respect of the velocity distribution, shear stress variation, ski-jump trajectory and the critical submergence depth.