转弯河段重力坝组合挑流消能建筑物体型优化试验研究

Experimental Research on Shape Optimization of Flood Discharge and Energy Dissipation Structures of Hydropower Stations on Turning Channel

针对某大型水电站采用组合挑流消能方式时其消力池下游河道转弯、水流归槽难等问题,对2种泄洪消能建筑物体型布置方案的水力特性开展对比试验,获得挑流水舌及入水形态、消力池内流态及出池水流衔接等水力参数;通过体型优化,获得了满足设计要求的推荐方案,消除原设计方案中消力池底部冲刷严重,出池水流偏离主河槽且与下游河道衔接不佳,河道水位波动较大等不利水力学条件。

There is a contrastive experiment for two arrangements of shape and hydraulic characteristics of flood discharge and dissipation structures.In order to investigate the problems of turning and flow returning channel of downstream channel of stilling basin when trajectory energy dissipation is used.Trajectory nappe forms,flow patterns in stilling basin and connection of out-flow and a suggested scheme satisfying the design requirement are gained.The disadvantageous hydraulic conditions of the worse connection of out-flow and downstream channel and the big water-level fluctuation of river are eliminated.