2002 Volume 46 Pages 601-605
The Hydraulic design manual on energy dissipators has been reported on the basis of the experimental results on velocity characteristics of jumps, jump length, sequent depth ratio of jump, and etc. But, in these results, the effect of aerated inflow on characteristics of jumps has not been considered. Because, an aerated flow on smooth channel chutes has not been formed in experimental models even if the boundary layer of supercritical flow is fully developed. This paper presents the effect of the aerated inflow on characteristics of jumps in a sloping channel. The experiment reveals that the different flow condition is observed between aerated and non-aerated inflows. For an aerated inflow, the jump length can be reduced, and the maximum velocity at each section decays in a short distance when a downstream depth and a channel slope become large. The present study gives a significant point for the hydraulic design of an energy dissipator with a jump formation.
