抽水蓄能电站侧式进出水口水力损失演化过程研究  

Evolution of hydraulic losses in the side inlet and outlet of a pumped storage power station

作　　者：郭苗 黄子豪 宋蕊香[2] 姜姿云 王薇[1] 郭超[1] GUO Miao;HUANG Zihao;SONG Ruixiang;JIANG Ziyun;WANG Wei;GUO Chao(School of Water Resources and Hydropower Engineering,North China Electric Power University,Beijing 102206,China;POWERCHINA Beijing Engineering Corparation Limited,Beijing 100024,China)

机构地区：[1]华北电力大学水利与水电工程学院,北京102206 [2]中国电建集团北京勘测设计研究院有限公司,北京100024

出　　处：《水利学报》2024年第12期1461-1471,共11页Journal of Hydraulic Engineering

基　　金：国家自然科学基金面上项目(52279084,52206048);中央高校基金项目(2024MS065)。

摘　　要：抽水蓄能电站侧式进出水口是电站引水系统重要组成部分,其内部流态对整个电站安全运行具有重要意义。本文以某抽蓄电站下水库侧式进出水口为研究对象,联合RNG k-ε湍流模型与改进的考虑壁面粗糙度的壁面函数模型,研究同流量不同水位下进流、出流工况下侧式进出水口的内部流态、涡旋分布、水力损失等水力特性,数值模型结果与模型试验结果吻合较好。此外,构建了基于能量守衡方程的抽水蓄能电站侧式进出水口水力损失数理模型,并给出了各种水力损失对最终整体水力损失的贡献度,将水力损失演化过程与具体流态对应,量化分析侧式进出水口中的局部具体能量损失,为下一步水力优化做好基础工作。研究结果表明:高水位的发电工况在进出水口内部的水流流态较为紊乱,并伴随有程度不一的流动分离现象以及涡旋产生;发电工况的流量分配不均匀性更大并且存在偏流现象;发电工况的水力损失较大且主要集中在调整段及防涡梁段。本文研究结果对后续相关领域优化设计具有参考意义。The side inlet and outlet of pumped storage power station are important components of the station’s diversion system,and the flow pattern within them is of great significance to the safe operation of the entire power station.In this paper,the side inlet and outlet of a pumped storage power station were selected as the research object,and the internal flow pattern,vortex distribution,hydraulic loss and other hydraulic characteristics of the side inlet and outlet under the same flow rate and different water levels were investigated by combining the revised wall roughness theoretical model and the RNG k-εturbulence model.The results of the numerical model and those of the experimental model are in good agreement.In addition,a numerical model of hydraulic losses in the local hydraulic system of the side inlet and outlet of pumped storage power station based on the energy balance equation was constructed first,and then,the contribution of various hydraulic losses to the global hydraulic losses was given.Finally,the hydraulic loss evolution process was corresponded to the specific flow pattern,to quantify and jointly analyze the relevant specific hydraulic losses in the side inlet and outlet,which make a good groundwork for the next step of hydraulic optimization.The results indicate that the flow pattern inside the inlet and outlet is more turbulent in cases of high-water level power generation,accompanied by varying degrees of flow separation and vortex generation.Additionally,the flow distribution in these power generation cases is more uneven,exhibiting a phenomenon of biased flow.The hydraulic loss in power generation cases cannot be ignored and mainly concentrated in the adjustment section and anti-vortex beam section.The results of this paper have significant reference value for the subsequent optimization of design in related fields.

关 键 词：粗糙壁面函数模型 RNG k-ε湍流模型 侧式进出水口 水力损失 

分 类 号：TV732[水利工程—水利水电工程]