多闸孔溢流坝小流量泄洪消能闸门调度优选方式研究

Research on the Optimal Mode of Small Flow Flood Discharge and Energy Dissipation Gate Dispatching for the Multi-Sluice Spillway Dam

以某水库多闸孔溢流坝为例,利用Flow-3D软件建立数学模型研究小流量下闸孔优化调度运行。通过分析正常运行水位小流量(Q=300 m^3/s)下多闸孔闸门不同的组合开启方式下的堰面流态、挑流特性、坝下河道流速、河底压强、消能率水力要素,总结了多闸孔溢流坝调度运行的水力学规律,给出了小流量下该工程的优化调度方式。结果表明:在6种开启方式下,连续开2~3号闸孔相比其他开启方式进行泄洪消能较优,水力条件较稳定。

Taking a multi-sluice overflow dam of a reservoir as an example,the flow model is established by Flow-3d software to study the optimal operation of gates under small flow.By analyzing the different combinations of the multi-sluice gates under normal operation water level(Q=300 m^3/s),the flow characteristics of the rake surface,the characteristics of the pick-up flow,the flow velocity of the river under the dam,the pressure at the bottom of the river,and the hydraulic factors of the energy dissipation rate are summarized.The hydraulic law of the multi-sluice overflow dam dispatching operation is given,and the optimal scheduling mode of the project under small flow is given.The results show that under the six opening modes,the continuous opening of the 2-3 gate holes is better than the other opening modes,and the hydraulic conditions are relatively stable.