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

Mansour, Michael; Kopparthy, Saketh

doi:10.1016/j.ijheatfluidflow.2022.108939

Cited by 25 publications

(25 citation statements)

References 38 publications

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“…The multiphase fluid calculation is accomplished by analyzing variations in the volume fraction of each phase within the mixed fluid. The volume equation for the qth phase in a mixed fluid is as follows [15,16]:…”

Section: Multiphase Flow Modelmentioning

confidence: 99%

A Numerical Study on the Effect of the Backflow Hole Position on the Performances of a Self-Priming Pump

Wang,

Cao,

Wang

et al. 2024

FDMP

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A self-priming pump is a centrifugal pump that has the ability to prime itself. Typically, its performance depends on the configuration of its reflux hole. In this study, the ANSYS FLUENT software is used to investigate the effects of three different radial positions of the reflux hole on gas-liquid two-phase distribution, pressure pulsation, and imp during self-priming. The research results indicate that: (1) The effective channel size for the reflux liquid to enter the volute varies depending on the location of the reflux hole. The effect of the impeller rotation on the reflux liquid becomes more obvious as the setting distance of the reflux aperture decreases. (2) The position of the reflux hole significantly affects the gas phase mass fraction inside the impeller, resulting in a significant reduction in the time it takes for the mass fraction to exceed 80%. (3) The position of the reflux hole significantly affects the average pressure on each monitoring surface. (4) Placing the reflux hole at a excessively distant radial distance can result in an excessive vertical component. (5) The self-priming performance of the pump can be improved to some extent by placing the return hole at a small radial distance.

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Section: Multiphase Flow Modelmentioning

confidence: 99%

A Numerical Study on the Effect of the Backflow Hole Position on the Performances of a Self-Priming Pump

Wang,

Cao,

Wang

et al. 2024

FDMP

View full text Add to dashboard Cite

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“…In this case, the pump works very inefficiently due to gas locking [7,24], and, in some cases, the pump completely loses its functionality [11,[25][26][27]. This phenomenon is know as pump "breakdown" [28][29][30][31][32]. In the literature, pump breakdown is frequently referred to as "gas locking" [33][34][35].…”

Section: Introductionmentioning

confidence: 99%

“…The bubble size typically increases with the increasing inlet gas volume fraction, since the number of gas bubbles present in the liquid increases and the bubbles start to coalesce and grow in size [20,51,52]. Further, the increase in the rotational speed decreases the bubble size due to the higher shear force applied to the bubbles, which leads to a break up of the bubbles to finer ones [20,32,[51][52][53]. The increase in the liquid flow rate also affects the bubble size.…”

Section: Introductionmentioning

confidence: 99%

“…Earlier investigations published in the literature studied the effects of numerous important flow factors, revealing significant information concerning the research problem. For instance, higher rotational speeds can enhance the transport of a two-phase flow [32,34,35,38]. When the rpm is increased, the flow becomes faster in the inlet pipe and the gas phase becomes more dispersed before entering the impeller.…”

Section: Introductionmentioning

confidence: 99%

“…When the rpm is increased, the flow becomes faster in the inlet pipe and the gas phase becomes more dispersed before entering the impeller. The increased rotational speed also enhances the shear force and turbulence within the impeller, which hinders the accumulation of the gas phase and delays flow regime transition [32,38,40,42,60]. Accordingly, the pump maintains a more stable performance under higher gas contents when running with higher rotational speeds.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

State of the Art on Two-Phase Non-Miscible Liquid/Gas Flow Transport Analysis in Radial Centrifugal Pumps Part B: Review of Experimental Investigations

Mansour,

Thévenin

2023

IJTPP

Self Cite

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This paper aims to summarize the results of several experimental investigations regarding two-phase liquid–gas flows in radial centrifugal pumps. The main objective is to combine the corresponding experimental results and collect the obtained knowledge to provide a better understanding of this configuration. The simultaneous transport of the two phases, the phase segregation, and the regions of safe or critical pump performance were described for a wide variety of pump configurations. This review covers single- and two-phase pumping conditions, performance degradation, pump breakdown, performance hysteresis, different flow regimes, flow regime maps, flow instabilities, and surging. This manuscript also considers the influence of employing different pump configurations on pump performance and flow regimes. This includes comparisons between closed and semi-open impellers, standard and increased tip clearance gaps, and running the pump with and without an inducer. Many of the results discussed have been published in a series of research papers. They were all collected, summarized, and compared systematically in the present review.

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Investigation of double-volute balancing in centrifugal pumps

Kibar,

Yigit

2024

Meccanica

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

Cited by 25 publications

References 38 publications

A Numerical Study on the Effect of the Backflow Hole Position on the Performances of a Self-Priming Pump

A Numerical Study on the Effect of the Backflow Hole Position on the Performances of a Self-Priming Pump

State of the Art on Two-Phase Non-Miscible Liquid/Gas Flow Transport Analysis in Radial Centrifugal Pumps Part B: Review of Experimental Investigations

Investigation of double-volute balancing in centrifugal pumps

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