分水墙对表底孔共用消力池水力特性的影响

Impact of Baffle Wall on Hydraulic Characteristics of Common Stilling Pool of Surface Hole and Bottom Hole

针对表底孔共用消力池内复杂的流态,以缅甸联邦NAM PAW水电站为例,采用比尺为1∶50的物理模型试验,研究了表底孔共用消力池有无分水墙时的水流特性。试验结果表明,无分水墙时能加剧表底孔水流掺混碰撞,有效减小消力池内临底流速,有利于消能;能在一定程度上减轻下游河床冲刷,可为同类工程设计提供参考。

For the complex flow in common stilling pool of surface hole and bottom hole,based on the NAM PAW hydropower station of the Federal Republic of the Union of Myanmar,the physical model test at scale 1:50 was used to study the characteristics of water flow in common stilling pool of surface hole and bottom hole with or without baffle wall.The results show that without baffle wall intensified water flow mixing and collision of the surface hole and bottom hole,effectively reduced the bottom flow velocity in the stilling pool and was favor to energy dissipation as well as decreased the scour of the downstream river bed in some degree,which can provide reference for similar engineering design.