农业工程学报2012，Vol.28Issue(7)：67-72,6.DOI:10.3969/j.issn.1002-6819.2012.07.012
液力透平非定常压力脉动的数值计算与分析
Simulation and analysis of unsteady pressure fluctuation in hydraulic turbine
摘要
Abstract
Pressure pulsation of internal flow field within pump as turbine is one of the major factors affecting the stability of turbine unit. To research the unsteady pressure field in pump as turbine, computational fluid dynamics software CFX was adopted in the unsteady flow field analysis. Pressure pulsation results at various monitoring points were acquired and frequency analyses were performed based on these results. Results show that the pressure value decreases along the flow channel of hydraulic turbine. The pressure pulsations at volute cut water and the inlet of volute spiral development part are small. The main frequency of pressure pulsation in volute is two times of the impeller rotational frequency. The most intensive pressure pulsation of hydraulic part in hydraulic turbine is impeller and the most intensive location happens at the middle of impeller passage. The main frequency of impeller pressure pulsation is two times of the blade passing frequency. The pressure pulsation in outlet pipe gradually decreases along the pipe, and its main frequency of pressure pulsation is two times of the impeller rotational frequency.关键词
液力透平/数值方法/模拟/压力脉动/非定常流场Key words
turbines/numerical methods/computer simulation/pressure pulsation/unsteady flow field分类
机械制造引用本文复制引用
杨孙圣,孔繁余,张新鹏,黄志攀,成军..液力透平非定常压力脉动的数值计算与分析[J].农业工程学报,2012,28(7):67-72,6.基金项目
国家科技人员服务企业行动项目(2009GJC10007) （2009GJC10007）
江苏大学博士创新基金(CX10B_012X). （CX10B_012X）
