ABSTRACT
When the multiple-outlet sluice is opened partly, the mainstream compression of 3D abrupt expansion hydraulic jump is formed behind the sluice. Different situations were simulated with a 1:100 sluice model. And the submerged delta wing is introduced into the cross-section analysis system before the hydraulic jump as an auxiliary energy dissipater. The results show that the submerged triangle wing could adjust the redistribution of momentum and depth on the cross-section before a hydraulic jump and strengthen the stability of the section by decreasing the unit-width discharge of the mainstream, which made the energy dissipation of the hydraulic jump more adequate. It also reduced the distance from the drain to the cross-section before a hydraulic jump. The results could provide technical support for engineering applications.
