水利学报2017，Vol.48Issue(3)：299-307,9.DOI:10.13243/j.cnki.slxb.20160299
水轮机活动导叶关闭过程中导水机构内动态流场数值模拟研究
Numerical simulation of dynamic flow around wicket gate in hydro turbine with guide vane closure
摘要
Abstract
The strong fluid transient induced by the hydraulic transient process is an unsteady turbulent flow,which has an important influence on the stable operation of hydro unit.In order to explore the hydro-turbine dynamic regulating action induced by strong fluid transient effect on the transient characteristics of the unit,the immersed boundary method and large eddy simulation for simulating fluid-structure interaction were applied to deal with the strong nonlinear dynamic boundary problem of fluid dynamics.The distribution of pressure and wake structure was finely simulated in linear cascades in a channel The flow field of the downstream is very complicated due to the unsteady flow characteristics of staying vanes and moving guide vanes.The dynamic flow around wicket gate in hydro-turbine with guide vane closure was simulated.The change of corresponding flow topology is more complicated.The real simulation of the closing process of guide vanes in wicket gate was performed.The method can be used for the fine simulation of flow around multi-cascade in hydro-turbine,and provides reference for studying the transient performance influenced by the oscillation in the hydro-turbine adjusted process.The research was instructive to the hydraulic transient of the upstream pressure conduit and the three dimensional hydraulic transient effect of hydro-turbine.关键词
水轮机导叶叶栅/浸入边界法/大涡模拟/尾迹/数值模拟Key words
hydro-turbine vane cascades/immersed boundary method/large eddy simulation/wake/numerical simulation分类
能源科技引用本文复制引用
黄剑峰,张立翔,杨松,姚激..水轮机活动导叶关闭过程中导水机构内动态流场数值模拟研究[J].水利学报,2017,48(3):299-307,9.基金项目
国家自然科学基金项目(51541913,51279071) （51541913,51279071）
云南农业大学自然科学青年基金项目(2015ZR17) （2015ZR17）
