宽尾墩消力池水动力及调控响应特性研究

基于景洪水电站1:100的物理模型,对Y型宽尾墩消力池的水动力及调控响应特性进行研究,主要研究了水垫厚度、单宽流量、开孔方式对动水压强的影响。研究发现:时均压强主要受水垫厚度控制而受单宽流量的影响不大,时均压强随水垫厚度的增加而增加;脉动压强同时受水垫厚度和单宽流量控制,脉动压强随水垫厚度增加而减小、随单宽流量增大而增大;动水压强随开孔方式的改变而变化,在试验的开孔方式下,表孔由间隔开启变为相邻开启,对表孔中线的脉动压强最大值、闸墩中线的脉动压强最大值均有削弱的作用。

Study on hydrodynamics and regulatory response characteristics of stilling pool under jets from tail-flaring pier spillway

Based on a 1:100-scale model of the Jinghong hydropower station, we study the hydrodynamics and regulatory responses of a stilling pool under the jets from a tail-flaring pier spillway, focusing on the influence of water cushion depth, unit discharge and opening mode on hydrodynamic pressure. We found that time-average pressure is dominated by water cushion depth, independent of the unit discharge and increasing with this depth, while pressure fluctuations depend on these two factors, reduced by a thinner cushion and intensified by a larger unit discharge. And dynamic water pressure is different in different gate operation modes. In the test, as the opening mode of surface outlets shifts from the alternate pattern to sectional pattern, the peak values of fluctuating pressure at their centerlines and at the pier centerlines are weakened.