Experimental Study on Shape Optimization of Nonpressure Tunnel Intersection Area in Pumped Storage Power Station
Given the complex hydraulic characteristics of water flow in the intersection area of non-pressure tunnels,the study on the shape of the intersection area and the hydraulic characteristics of the confluence zone has great engineer-ing significance for ensuring the safe operation of the water conservancy project.Based on the physical model test,the shape of the intersection area of the high drop sediment discharge tunnel and emptying tunnel of the lower reservoir of a pumped storage power station was optimized.Finally,the intersection shape of the arc connection+cross angle 21° was determined,and the hydraulic characteristics under the optimized shape of intersection area were analyzed.The results show that under the six characteristic test conditions,the intersection area and downstream are rapid flow without pres-sure flow,the flow pattern is stable.The maximum water depth is formed at the right straight wall of the intersection ar-ea,the water depth is lower than the height of the straight wall,which meets the requirement that the water surface line should not exceed the straight wall.
cross non-pressure tunnelshape optimizationconfluence flowpumped storage power stationmodel test
万方数据
维普
