排灌机械工程学报
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Journal of Drainage and Irrigation Machinery Engin  2019, Vol. 37 Issue (5): 387-392    DOI: 10.3969/j.issn.1674-8530.18.1241
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Numerical simulation on pressure pulsation in multistage centrifugal pump under several working conditions
HUANG Kaile, YUAN Jianping*, SI Qiaorui, LIN Gang
National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China
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Abstract In order to study the characteristics of pressure pulsation and unsteady flow features in multistage centrifugal pumps, a three-stage centrifugal pump model served as flow simulation object. The DES method was used to simulate the unsteady flow in the pump under four working conditions. The reliability of numerical simulation was demonstrated by comparing the predicted performance with the measured characteristic. Thirty-six monitoring points were set up in the impeller, radial diffuser and return channel in each stage. It is shown that the throat of the radial diffuser is subject to a pressure pulsation in low frequency. At different flow rates, the pressure pulsation presents periodicity and the most pulsation intensity occurs in the radial diffuser, but also the amplitude of pressure pulsation increases when the working point deviating from the design flow condition. At different flow rates, the main frequency of pressure pulsation in the radial diffuser is the blade passing frequency of 327 Hz and the peak amplitude at the blade passing frequency multiplied by an integer is attenuated rapidly. The results provide a theoretical reference to revealing pressure pulsation law in multistage centrifugal pumps.
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HUANG Kai-Le-Symbol`@@
YUAN Jian-Ping-*
SI Qiao-Rui
LIN Gang
Key wordsmultistage centrifugal pump   pressure fluctuation   multiple conditions   numerical simulation     
Received: 2018-05-21;
Cite this article:   
HUANG Kai-Le-Symbol`@@,YUAN Jian-Ping-*,SI Qiao-Rui et al. Numerical simulation on pressure pulsation in multistage centrifugal pump under several working conditions[J]. Journal of Drainage and Irrigation Machinery Engin, 2019, 37(5): 387-392.
 
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