The formation and extension of the gas pocket in the impeller can lead to the rapid deterioration or even failure of the centrifugal pump's two-phase pressurization. It is difficult to directly measure the characteristic parameters of the gas pocket in the high-speed rotating impeller, such as the void fraction, by experimental methods. In this paper, the two-phase performance of the centrifugal pump is studied by numerical simulation and validated by the experiment. The positive pressure gradient at the end of the blade pressure surface is the main reason why the centrifugal pump can boost at high inlet gas volume fraction (IGVF). As the IGVF increases, both the length and thickness of the gas pocket gradually increase. The head coefficient of the pump has an approximately quadratic relationship with the void fraction in the impeller. The mechanism model of the gas pocket flow is established by the force analysis of the gas pocket and its downstream single bubble in the impeller channel. The model can effectively predict the extension position of the gas pocket and the void fraction in the centrifugal impeller and is validated by numerical simulation.
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November 2024
Research Article|
November 12 2024
Numerical simulation and mechanistic model study of gas pocket distribution characteristics in a centrifugal impeller Available to Purchase
Xiaobin Su (苏筱斌)
;
Xiaobin Su (苏筱斌)
(Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Validation, Writing – original draft)
State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University
, No. 28, Xianning West Road, Xi'an, Shaanxi 710049, People's Republic of China
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Qiang Xu (徐强);
Qiang Xu (徐强)
a)
(Methodology, Supervision, Validation, Writing – original draft)
State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University
, No. 28, Xianning West Road, Xi'an, Shaanxi 710049, People's Republic of China
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Chenyu Yang (杨晨宇)
;
Chenyu Yang (杨晨宇)
(Formal analysis, Software)
State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University
, No. 28, Xianning West Road, Xi'an, Shaanxi 710049, People's Republic of China
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Xiaoyu Dai (戴晓宇);
Xiaoyu Dai (戴晓宇)
(Formal analysis, Software)
State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University
, No. 28, Xianning West Road, Xi'an, Shaanxi 710049, People's Republic of China
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Liejin Guo (郭烈锦)
Liejin Guo (郭烈锦)
a)
(Conceptualization, Resources, Supervision)
State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University
, No. 28, Xianning West Road, Xi'an, Shaanxi 710049, People's Republic of China
Search for other works by this author on:
Xiaobin Su (<span class='lang' lang='zh'>苏筱斌</span>)
Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Validation, Writing – original draft
State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University
, No. 28, Xianning West Road, Xi'an, Shaanxi 710049, People's Republic of China
Qiang Xu (<span class='lang' lang='zh'>徐强</span>)
Methodology, Supervision, Validation, Writing – original draft
a)
State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University
, No. 28, Xianning West Road, Xi'an, Shaanxi 710049, People's Republic of China
Chenyu Yang (<span class='lang' lang='zh'>杨晨宇</span>)
Formal analysis, Software
State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University
, No. 28, Xianning West Road, Xi'an, Shaanxi 710049, People's Republic of China
Xiaoyu Dai (<span class='lang' lang='zh'>戴晓宇</span>)
Formal analysis, Software
State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University
, No. 28, Xianning West Road, Xi'an, Shaanxi 710049, People's Republic of China
Liejin Guo (<span class='lang' lang='zh'>郭烈锦</span>)
Conceptualization, Resources, Supervision
a)
State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University
, No. 28, Xianning West Road, Xi'an, Shaanxi 710049, People's Republic of China
Physics of Fluids 36, 113334 (2024)
Article history
Received:
August 19 2024
Accepted:
October 20 2024
Citation
Xiaobin Su, Qiang Xu, Chenyu Yang, Xiaoyu Dai, Liejin Guo; Numerical simulation and mechanistic model study of gas pocket distribution characteristics in a centrifugal impeller. Physics of Fluids 1 November 2024; 36 (11): 113334. https://doi.org/10.1063/5.0234043
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