金平水电站放空管水垫塘消能设计

Energy Dissipation Scheme Design for the Water Cushion Pool behind the Emptying Tunnel in Jinping Hydropower Station

介绍金平水电站放水管水垫塘消能的结构形式、水垫塘消能机理,通过水力学计算优化了放水管出流口的角度和水垫塘的结构尺寸。工程运行结果表明:放空管水垫塘较好地解决了高速水流的消能问题,相关水力学模型试验成果可给后期研究提供参考。

In Jinping Hydropower Station,the water cushion pool type energy dissipation scheme is adopted for the emptying tunnel. The structure and the energy dissipation mechanism of the water cushion pool are introduced. Then,the angle of the emptying tunnel outlet and the structural dimensions of the water cushion pool are optimized using hydraulic calculations. Practical operation shows that the high speed discharging water flow energy dissipation performance of the water cushion pool is satisfactory. Also,the hydraulic model test results could be useful references for the following studies.