水利水电科技进展2013，Vol.33Issue(3)：29-33,5.DOI:10.3880/j.issn.1006-7647.2013.03.007
基于脱体涡模型的竖井贯流式水轮机组压力脉动数值分析
Numerical analysis of pressure pulsation of pit water turbines based on detached-eddy model
摘要
Abstract
Three-dimensional unsteady eddy numerical simulations are carried out for the hydraulic performances of the pit turbine unit of a tidal power station by using the detached-eddy model based on the CFD method.The pressure pulsation information at key measuring points located in the passage under different water heads is obtained and analyzed.The results show that all the pressure pulsation in the whole passage of the tidal pit turbine contains rotation frequency,and the nearer the distance to the runner is,the larger is the amplitude of the rotation frequency.The pressure pulsation at the runner chamber is strong,and its amplitude increases with the increase of water heads.The predominant frequency is the rotation frequency with three and six times.The pressure pulsation at the inlet side of guide vanes and the outlet conduit is weak and its frequency is low.Change of the water head has a little effect on the pressure pulsation at the inlet side of guide vanes.The flow regime in the outlet conduit is the best under the design condition,and the pressure pulsation is the smallest.关键词
竖井贯流式水轮机/脱体涡模型/压力脉动/频谱分析Key words
pit water turbine/ detached-eddy model/ pressure pulsation/ spectral analysis分类
能源科技引用本文复制引用
周大庆,张蓝国,郑源,茅媛婷..基于脱体涡模型的竖井贯流式水轮机组压力脉动数值分析[J].水利水电科技进展,2013,33(3):29-33,5.基金项目
海洋可再生能源专项(GHME2011CX02) （GHME2011CX02）
