人民长江2016，Vol.47Issue(9)：95-99,5.DOI:10.16232/j.cnki.1001-4179.2016.09.022
混流式水轮机压力脉动特性研究
Study of pressure pulsation characteristics of Francis Turbine
摘要
Abstract
To understand the influence of ratio of long and short blades on pressure pulsation of Francis turbine, on the basis of numerical simulation of flow field, the 3D full-passage unsteady turbulent flow in Francis turbine passage for different ratio of long and short blades was calculated The results show that the pressure pulsation inside the Francis turbine is caused by rotor-stator interaction of runner and stator and the low-frequency pressure pulsation of draft tube. The efficiency of the Francis tur-bine reaches the largest of 92. 66% when the ratio of the closest distance between short blade and rotation axis to the diameter of long blade is equal to 0. 6; meanwhile, the corresponding pressure pulsation amplitude and the vibration amplitude of all flow passage components are the minimum, so the hydraulic stability is the best.关键词
非定常湍流/数值模拟/压力脉动/混流式水轮机Key words
unsteady turbulent flow/numerical simulation/pressure pulsation/Francis turbine分类
建筑与水利引用本文复制引用
罗丽,李景悦..混流式水轮机压力脉动特性研究[J].人民长江,2016,47(9):95-99,5.基金项目
国家自然科学基金资助项目(51379179) （51379179）
西华大学研究生创新基金资助项目(ycjj2015042) （ycjj2015042）
