云南水力发电2024，Vol.40Issue(5)：138-141,4.DOI:10.3969/j.issn.1006-3951.2024.05.034
混流式水轮机非定常旋涡流动研究
Analysis of Unsteady Vortex Flow in Francis Hydro-Turbine
摘要
Abstract
This paper uses standard k-εmodel to conduct three-dimensional unsteady numerical simulation of the entire flow channel of a hydroelectric power plant turbine,and studies the influence of internal blade passage vortices on the formation and evolution of tailwater vortex strips.By analyzing the internal flow field of the impeller and tailwater pipe under two different flow conditions,this study explores and reveals the growth,collapse,and mutual interference evolution mechanisms of blade channel vortices and tailwater vortex bands.The research results indicate that by simulating the entire flow field inside the water turbine,the formation and evolution characteristics of the internal three-dimensional vortex structure can be intuitively and dynamically displayed.Moreover,by observing the blade passage vortex inside the impeller and the tailwater vortex strip inside the tailwater pipe,the mutual interference process between the two can be clearly displayed.Therefore,this numerical simulation has certain reference value for exploring the safe operation of water turbine units.关键词
混流式水轮机/非定常流/叶道涡/尾水涡Key words
Francis hydro-turbine/unsteady flow/blade passage vortex/tailwater vortex分类
能源科技引用本文复制引用
杨锡平,张思青..混流式水轮机非定常旋涡流动研究[J].云南水力发电,2024,40(5):138-141,4.基金项目
江苏省高等学校自然科学研究项目(23KJB460009、23KJB470006) （23KJB460009、23KJB470006）
南通市基础研究计划项目(JC22022066) （JC22022066）
南通市社会民生科技计划项目(MSZ2023001、MSZ2023007) （MSZ2023001、MSZ2023007）
