A simple Technique for Preventing Vortex With Some Aspects of Flow under Inclined Sluice Gates

In this paper the effect of vortex formation upstream inclined sluice gate, discharge coefficient as well as predicted discharge equation have been studied for several gate openings (3,4&4.5) cm, five discharges and three different gate cases, vertical and inclined opposite flow direction in (30 and 45)° angles. It was found that there is no vortex at vertical sluice gate but observed at gate inclined opposite flow direction. There are tow corner vortices in high discharges and one central vortex in low discharges. The reduction of these vortices has been studied by vortex decay elements. The average discharge coefficient for vertical gate was 0.645 while these values reduced to 0.59 and 0.564 for gate inclined (30 and 45)° opposite flow direction respectivel