EXPERMENTAL STUDY A FLIP BUCKET JET ON DOWNSTREAM SCOUR USING A PHYSICAL MODEL

The scouring process downstream of spillways is an important research topic of value in engineering practice. Information on the depth of the scour hole formed downstream of a ski-jump bucket type of energy dissipator is necessary in determining the safety of dams and adjoining structures. In this research, the downstream scour phenomenon of a flip bucket jet was investigated in free conditions, as well as in the presence of a trapezoidal and triangular slot in the coastal with different layout intervals at flow rate of 9, and a total of 45 experiments. The results of this study showed that the presence of the slot has significant effects on the depth and range of scour so that the fit bucket jet with alternate triangular slots reduces the scour by about 12.7% compared to the no slot mode. Moreover, the maximum scour depth occurs in bucket mode with the alternate trapezoidal slots in the more favorable interval than the rest of the models. Then, the results were compared with several empirical formulas and it was determined that the results of Veronese A relation shows closer results to the actual values.