摘要
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。
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.
作者
练继建
边玉迪
李会平
叶德震
LIAN Jijian;BIAN Yudi;LI Huiping;YE Dezhen(State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin University,Tianjin 300350;School of Civil Engineering,Tianjin University,Tianjin 300350)
出处
《水力发电学报》
EI
CSCD
北大核心
2020年第1期1-11,共11页
Journal of Hydroelectric Engineering
基金
国家重点研发计划(2016YFC0401904)
国家自然科学基金(51779167)
云南省马洪琪院士2016年自由探索项目(2016HA012).
关键词
宽尾墩
底流消能
运行方式
调控响应
动水压强
模型试验
flaring gate pier
underflow energy dissipation
operation mode
regulation response
hydrodynamic pressure
model test
