西安理工大学学报Issue(3)：265-272,8.
水泵水轮机内部压力脉动特性研究
Research on characteristics of pressure fluctuation in a pump-turbine
摘要
Abstract
In order to study the pressure fluctuation characteristics on different parts of the pump-turbine,this paper adopts computational fluid dynamics software to conduct unsteady numerical calculation on three-dimensional full port internal flow under the design point of the pump-tur-bine,and simultaneously monitors pressure fluctuation on places near the volute tongue insula-tion,on the head cover,between the runner and the guide vane and in the draft tube taper pipe. It can be concluded from the analysis and calculation of the pressure fluctuation results that:in the head cover area of the units,pressure fluctuation is relatively obvious and under the turbine working condition,the pulse frequency is mainly twice as much as the leaf frequency.Moreover, under the pump condition,the pulse frequency is mainly one time as much as the leaf frequency. For the bladeless area between the runner and the guide vane,pulse frequency under both pump condition and turbine condition approaches one time of the leaf frequency,and pressure pulsation frequency under this monitor point is mainly resulted by rotor-stator interaction between the run-ner and the guide vane.In the runner area,the pressure pulsation frequency under turbine condi-tion shows diversity,while the frequency under pump condition is mainly multiple of rotating fre-quency.The main frequency of the draft tube's straight taper section under the optimal condition equals to one time of the rotating frequency,and the vibration amplitude is relatively smaller.关键词
水泵水轮机/内部流动/压力脉动/数值计算Key words
pump-turbine/internal flow/pressure fluctuation/numerical calculation分类
信息技术与安全科学引用本文复制引用
吴广宽,罗兴锜,赵强,冯建军..水泵水轮机内部压力脉动特性研究[J].西安理工大学学报,2015,(3):265-272,8.基金项目
国家自然科学基金资助项目（51339005，51379174，51479167）。 （）
