Abstract：In order to study the characteristics of the pressure fluctuation in volutes caused by unsteady flow in centrifugal pumps, the whole flow field including those in the suction casing, impeller and discharge casing of a centrifugal pump was simulated based on large eddy simulation（LES）. The impeller of the pump has three long blades and three splitter ones. The pressure fluctuation in the volute was analysed in time and frequency domains. The results show that the obvious fluctuation content depicts the interaction of the flow in impeller and that in volute. At design flow rate, the maximum fluctuation amplitude occurs at the interfaces between the impeller and volute and near the tongue. The dominant frequency of the monitor points in volute is of long blade passing frequency, and the subdominant one is of the splitter blade passing content. It can be found that the pressure fluctuation for different sections of volute is basically identical while the pressure fluctuation is more regular in the diffuser part than that in the spiral. There have no significant highfrequency components in volute at design flow rate.
袁建平, 付燕霞, 刘 阳, 张金凤, 裴 吉. 基于大涡模拟的离心泵蜗壳内压力脉动特性分析[J]. 排灌机械工程学报, 2010, 28(4): 310-314.
Yuan Jianping， Fu Yanxia， Liu Yang， Zhang Jinfeng， Pei Ji. Analysis on pressure fluctuation within volute of centrifugalpump based on large eddy simulation. Journal of Drainage and Irrigation Machinery Engin, 2010, 28(4): 310-314.
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