抽水蓄能电站侧式进/出水口局部非稳态现象研究  

Research on Local Instability Characteristics of Inlet/Outlet ofSide Pumped Storage Power Station

作　　者：魏杰 郭港归 顾莉 王立杰 苗宝广 WEI Jie;GUO Gang-gui;GU Li;WANG Li-jie;MIAO Bao-guang(Power China Zhongnan Engineering Corporation Limited,Changsha 410014,Hunan Province,China;School of Faculty of Infrastructure Engineering,Dalian University of Technology,Dalian 116081,Liaoning Province,China)

机构地区：[1]中国电建集团中南勘测设计研究院有限公司,湖南长沙410014 [2]大连理工大学建设工程学院,辽宁大连116081

出　　处：《中国农村水利水电》2025年第2期129-135,共7页China Rural Water and Hydropower

基　　金：水能资源利用关键技术湖南省重点实验室开放研究基金项目(PKLHD201804)。

摘　　要：在出流工况下,侧式进/出水口扩散段内水流与边壁易发生分离,产生局部非稳态现象,从而导致进/出水口流态紊乱。采用RNG k-?紊流模型对某抽水蓄能电站进/出水口流场进行三维数值模拟,并通过模型试验验证了数值模拟的合理性。研究结果表明:侧式进/出水口在扩散流时,受扩散角的影响在主流附近存在流动分离区,该区域紊动强度较大,形成局部非稳态现象,紊动强度与流速平方呈线性关系。流道内流速呈现周期性波动,波动周期与雷诺数近似呈幂函数关系。中间流道的波动周期小于边流道,且边中流道流速波动周期的差异与雷诺数呈现正相关。试验中对流速的监测时长应涵盖数个波动周期,才能准确衡量进/出水口的水力学特性。In the outflow condition,the water flow in the diffusion section of the side inlet/outlet is prone to be separated from the side wall,resulting in local unsteady state phenomenon,which leads to flow disorder at the inlet/outlet.In this paper,the RNG k-εturbulence model is used to conduct three-dimensional numerical simulation of the flow field at the inlet/outlet of a pumped storage power station,and the rationality of the numerical simulation is verified by model test.The results show that:when the side inlet/outlet diffuses the flow,there is a flow separation area near the mainstream due to the influence of the diffusion angle.The turbulence intensity in this area is large,resulting in local unsteady state phenomenon.The relationship between turbulence intensity and velocity square is linear.The flow velocity in the channel shows periodic fluctuations,and the fluctuation period is approximately in a power function relationship with the Reynolds number.The fluctuation period of the middle channel is smaller than that of the side channel,and the difference in the fluctuation period of the side channel and the middle channel is positively correlated with the Reynolds number.The monitoring time of the flow velocity in the model test should cover several fluctuation periods,so as to accurately measure the hydraulic characteristics of the inlet/outlet.

关 键 词：侧式进/出水口 扩散流 局部非稳态现象 数值模拟 

分 类 号：TV61[水利工程—水利水电工程]