Investigations on the effect of rotational speed on the transport of air-water two-phase flows by centrifugal pumps

Mansour Michael; Kopparthy Saketh; Thevenin Dominique

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Investigations on the effect of rotational speed on the transport of air-water two-phase flows by centrifugal pumps

机译：Investigations on the effect of rotational speed on the transport of air-water two-phase flows by centrifugal pumps

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This study presents experimental and numerical investigations on air-water flows in a centrifugal pump, extending our previous studies. The main objective of the present article is to examine the influence of rotational speed on pump performance. For that purpose, the pump performance was considered and extensively compared for two different rotational speeds, i.e., 650 rpm and 1000 rpm, covering different single and two-phase flow conditions. To allow flow visualization, the impeller and the pump body were manufactured from transparent materials, and a high-speed camera was employed for recording the two-phase flow regimes. The performance of the pump was illustrated and reported for either a constant gas volume fraction or a constant air flow rate at the pump inlet. The desired operating conditions at the inlet were achieved using various predetermined experimental procedures to study the performance hysteresis. Pump surging and breakdown conditions were also considered. Additionally, 3D URANS single-phase numerical simulations were performed to explain additional internal flow details. The moving-mesh approach combined with the k - omega SST turbulence model has been used for that purpose. The simulations agree well with the experiments in most cases. Overall, the results show that increasing the rpm enhances two-phase mixing, which leads to various and significant improvements regarding two-phase pumping performance.

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《International journal of heat and fluid flow》 |2022年第4期|108939.1-108939.16|共16页
作者
Mansour Michael; Kopparthy Saketh; Thevenin Dominique;
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作者单位

Helwan Univ, Fac Engn Mataria, Mech Power Engn Dept, Cairo 11718, Egypt|Univ Magdeburg Otto Von Guericke, Lab Fluid Dynam & Tech Flows, D-39106 Magdeburg, Germany;

Univ Magdeburg Otto Von Guericke, Lab Fluid Dynam & Tech Flows, D-39106 Magdeburg, Germany;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
中图分类
关键词
Centrifugal pumps; Rotational speed; Gas-liquid two-phase flow regimes; Computational fluid dynamics (CFD);

Investigations on the effect of rotational speed on the transport of air-water two-phase flows by centrifugal pumps

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