An Experimental Research on Optimization of Trajectory Bucket for Spillway Tunnel Outlet at Sanliping Hydropower Project

Several optimized designs of trajectory bucket pattern for spillway tunnel outlet are compared in the experiment of Sanliping hydropower project integer physical model and the results show that energy dissipation of outflow nappe is sufficient after optimization and no scouring occur near the riverbank either at high water level or at low water level, which ensure the security of spillway structure. And these experimental results can provide a scientific foundation for the design of Sanliping project.