顶盖减压管径和导叶转角对混流式水轮机轴向水推力的影响  

Effect of Head Cover Decompression Tube Diameter and Guide Vane Rotation Angle on Hydraulic Axial Thrust of A Francis Hydro-turbine

作　　者：赵霖 邹晓阳 龚真尧 赵炜 王颢钧 闵占奎 刘秀良 王文欢 潘卫国 ZHAO Lin;ZOU Xiao-yang;GONG Zhen-yao;ZHAO Wei;WANG Hao-jun;MIN Zhan-kui;LIU Xiu-liang;WANG Wen-huan;PAN Wei-guo(State Grid Gansu Electric Power Research Institute,Lanzhou 730070,China;College of Energy and Mechanical Engineering,Shanghai University of Electric Power,Shanghai 201306,China;State Grid Gansu Integrated Energy Service Co.,LTD,Lanzhou 730070 China)

机构地区：[1]国网甘肃省电力公司电力科学研究院,甘肃兰州730070 [2]上海电力大学能源与机械工程学院,上海201306 [3]国网甘肃综合能源服务有限公司,甘肃兰州730070

出　　处：《水电能源科学》2022年第6期188-191,82,共5页Water Resources and Power

基　　金：国网甘肃省电力公司科技项目(522721191008)。

摘　　要：轴向水推力过大是引起混流式水轮机推力轴瓦烧损的主要原因之一。针对某过流泥沙含量较大的水轮机,建立其主流道、上冠流道、下环流道的CFD仿真模型,在ANSYS FLUNET中采用MIXTURE多相流模型和RNGκ-ε两方程模型对各流道含沙水湍流流场进行稳态求解,分析了顶盖减压管径和活动导叶转角对水轮机轴向水推力的影响。结果表明,轴向水推力随泥沙含量增大近似线性增大,随顶盖减压管径的增大或导叶转角的减小而减小,且不同泥沙含量下的减小量接近。The overloading hydraulic axial thrust is one of the main factors affecting Francis hydro-turbine thrust bearing bush burned. In this paper, the CFD simulation model of a main flow passage, an upper crown passage and a lower ring passage of a Francis hydro-turbine set with a large sediment content was established. And then the steady turbulence fluid field was solved by taking advantage of MIXTURE multiphase flow model and RNG κ-ε two equation model in ANSYS FLUENT. The Effect of head cover decompression tube diameter and guide vane angle on the hydraulic axial thrust of the Francis hydro-turbine was analyzed. The results show that the hydraulic axial thrust increases approximately linearly with the increase of sediment content, and decreases with the increasing decompression tube diameter or the decreasing guide vane angle, with almost the same decrease for different sediment content.

关 键 词：混流式水轮机 轴向水推力 CFD 含沙水流 泥沙含量 

分 类 号：TV734.1[水利工程—水利水电工程]