Numerical Study of Pressure Fluctuation and Unsteady Flow in a Centrifugal Pump
A pump is one of the most important machines in the processes and flow systems. The operation of multistage centrifugal pumps could generate pressure fluctuations and instabilities that may be detrimental to the performance and integrity of the pump. In this paper, a numerical study of the influence...
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2019-06-01
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doaj-690fc018035243f5be9893031d139f8d2020-11-25T00:31:13ZengMDPI AGProcesses2227-97172019-06-017635410.3390/pr7060354pr7060354Numerical Study of Pressure Fluctuation and Unsteady Flow in a Centrifugal PumpLing Bai0Ling Zhou1Chen Han2Yong Zhu3Weidong Shi4National Research Center of Pumps, Jiangsu University, Zhenjiang 212013, ChinaNational Research Center of Pumps, Jiangsu University, Zhenjiang 212013, ChinaNational Research Center of Pumps, Jiangsu University, Zhenjiang 212013, ChinaNational Research Center of Pumps, Jiangsu University, Zhenjiang 212013, ChinaNational Research Center of Pumps, Jiangsu University, Zhenjiang 212013, ChinaA pump is one of the most important machines in the processes and flow systems. The operation of multistage centrifugal pumps could generate pressure fluctuations and instabilities that may be detrimental to the performance and integrity of the pump. In this paper, a numerical study of the influence of pressure fluctuations and unsteady flow patterns was undertaken in the pump flow channel of three configurations with different diffuser vane numbers. It was found that the amplitude of pressure fluctuation in the diffuser was increased gradually with the increase in number of diffuser vanes. The lower number of diffuser vanes was beneficial to obtain a weaker pressure fluctuation intensity. With the static pressure gradually increasing, the effects of impeller blade passing frequency attenuated gradually, and the effect of diffuser vanes was increased gradually.https://www.mdpi.com/2227-9717/7/6/354centrifugal pumppressure fluctuationunsteady flownumerical simulation |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Ling Bai Ling Zhou Chen Han Yong Zhu Weidong Shi |
spellingShingle |
Ling Bai Ling Zhou Chen Han Yong Zhu Weidong Shi Numerical Study of Pressure Fluctuation and Unsteady Flow in a Centrifugal Pump Processes centrifugal pump pressure fluctuation unsteady flow numerical simulation |
author_facet |
Ling Bai Ling Zhou Chen Han Yong Zhu Weidong Shi |
author_sort |
Ling Bai |
title |
Numerical Study of Pressure Fluctuation and Unsteady Flow in a Centrifugal Pump |
title_short |
Numerical Study of Pressure Fluctuation and Unsteady Flow in a Centrifugal Pump |
title_full |
Numerical Study of Pressure Fluctuation and Unsteady Flow in a Centrifugal Pump |
title_fullStr |
Numerical Study of Pressure Fluctuation and Unsteady Flow in a Centrifugal Pump |
title_full_unstemmed |
Numerical Study of Pressure Fluctuation and Unsteady Flow in a Centrifugal Pump |
title_sort |
numerical study of pressure fluctuation and unsteady flow in a centrifugal pump |
publisher |
MDPI AG |
series |
Processes |
issn |
2227-9717 |
publishDate |
2019-06-01 |
description |
A pump is one of the most important machines in the processes and flow systems. The operation of multistage centrifugal pumps could generate pressure fluctuations and instabilities that may be detrimental to the performance and integrity of the pump. In this paper, a numerical study of the influence of pressure fluctuations and unsteady flow patterns was undertaken in the pump flow channel of three configurations with different diffuser vane numbers. It was found that the amplitude of pressure fluctuation in the diffuser was increased gradually with the increase in number of diffuser vanes. The lower number of diffuser vanes was beneficial to obtain a weaker pressure fluctuation intensity. With the static pressure gradually increasing, the effects of impeller blade passing frequency attenuated gradually, and the effect of diffuser vanes was increased gradually. |
topic |
centrifugal pump pressure fluctuation unsteady flow numerical simulation |
url |
https://www.mdpi.com/2227-9717/7/6/354 |
work_keys_str_mv |
AT lingbai numericalstudyofpressurefluctuationandunsteadyflowinacentrifugalpump AT lingzhou numericalstudyofpressurefluctuationandunsteadyflowinacentrifugalpump AT chenhan numericalstudyofpressurefluctuationandunsteadyflowinacentrifugalpump AT yongzhu numericalstudyofpressurefluctuationandunsteadyflowinacentrifugalpump AT weidongshi numericalstudyofpressurefluctuationandunsteadyflowinacentrifugalpump |
_version_ |
1725323094423240704 |