Study on Energy Dissipation of Swallow-tail Flip Bucket in Small Crossing Angle Spillway of Narrow River
The space of ski-jump small crossing angle narrow channel spillway is limited.Ski-jump is instability when discharge changes greatly.In order to study the energy dissipation effect of swallow-tail flip bucket under this special ter-rain,based on an actual project,a variety of swallow-tail flip bucket modes are given by numerical simulation.The re-sults show that the second scheme has the best energy dissipation effect.When the opening width and the ratio of swal-low-tail width is 1 and the ratio of opening to spillway width is 0.5,the aeration effect of water tongue is the best.The water flow can be killed more energy in the air and the water flow velocity is lower.On the premise of satisfying the lift-ing,increasing the angle of falling sill is beneficial to increase the longitudinal stretching of water tongue.It can improve energy dissipation and utilization space.Energy dissipation scouring in this scheme is rechecked under different cascade discharge.In the second scheme,the drop point of flip bucket is still stable when the discharge is small or large.Scouring does not pose a safety threat to buildings.
NETL
NSTL
万方数据
维普
