Experimental Study on Optimization for Ski-jump Energy Dissipationwith Large-angle in Narrow Valley
Under the condition of narrow valley with large included angle,the ski-jump energy dissipation is prone to impact on both sides of the river and too deep scour pit.Thus,this study adopts a hydraulic overall model test to optimize the flip bucket shape of ski-jump energy dissipation in a representative deep hole water discharge and sand flushing tunnel of a water conservancy hub,and compares the shape of the water tongue and the scouring characteristics of the down-stream river.The results show that the asymmetric contraction of the shaped narrow slit energy dissipater can make the water flow in the narrow river return to the trough,and the tongue of the water longitudinal stretching effect is better,which significantly reduces the riverbed scour.The suitable ski-jump energy dissipation with characteristic parameters of contraction rate,contraction angle difference and oblique cross-sectional area ratio are proposed,which can be used as a reference for the design of ski-jump energy dissipation with large-angle in narrow valley.
narrow valleyski-jump energy dissipation with large-angle staggerednarrow-slotted energy dissipatorhydraulic model testshape optimization
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维普
