THE EFFECT OF DROP SHAPE ON VELOCITY CHARACTERISTICS IN HYDRAULIC JUMP BELOW DROP STRUCTURES

Abstract

 The formation of hydraulic jump is a useful method for energy dissipation below drop structures. When the jump is formed immediately below drops, the inflow codition (i.e., velocity priofile) might be affected downstream drop shape. This study investigated the effect of drop shape on velocity field in the jump under four different shapes. In conclusion, it has been found that the formation of separation zone at downstream face of the drop depends on drop shape, and that the inflow condition and the dacay of maximum velocity in jump associate with the formation of separation zone. For the development of main flow in jump, the relative drop height is more effective than the drop shape.