2001 Volume 45 Pages 415-420
Many researchers studied the energy loss for skimming flows, in which the main flow skims on the stepped channel chute and a corner eddy is formed at each step. But a general agreement on the experimental results has not been obtained. In this paper, the energy loss for skimming flows has been investigated systematically under wide ranges of discharges, channel slopes, step heights, and dam heights. The effects of the channel slope and the step height on the energy loss for skimming flows have been clarified. The energy loss for various changes of dam height has also been made clear. Further, the energy loss for the jump formation immediately below the stepped channel end has been shown, and the results reveal that the utilization of the stepped channel is effective in dissipating the energy of a supercritical flow on a spillway or a channel chute.
