convex region
2.According to the comparison between simulation results and laboratory measurements, this paper reaches the conclusion that the negative pressure region in convex boundary (including broken line gradient) not only caused by boundary layer separation, but also especially caused by centrifugal force which is the result of convex boundary.
4.Abstract: Navigation and hydropower project at Feng Dongzi in Qujiang River is a comprehensive utilization hydro-junction of navigation combining with water power.Water intake for hydro-power station is located at the unfavorable convex bank in the bending river.In connection with the results of model test,this paper studies the different moving characteristics of water and silt in the reach of dam region before and after the project is built.The reasonableness of plane layout for water intake and fail-water channel is shown,and the influence on sand prevention during water diversion for reservoir sedimentation is discussed.It is put forward to project measures of improving conditions of sand prevention during water diversion for hydroplant intake,and synthetic system of sand prevention for intercepting sand,leading sand,and draining sand is adopted.Better effects for sediment control are gained.The recommended schemes have been adopted by design department.
