Effects of Entrained Air on the Performance of Centrifugal Pumps : 2nd Report, Effects of number of blades

Murakami, Mitsukiyo; Minemura, Kiyoshi

doi:10.1299/jsme1958.17.1286

Cited by 82 publications

(25 citation statements)

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“…The pioneering experimental studies conducted by Murakami and Minemura [31,32] investigated centrifugal pump performance with gas entrainment. By employing a semi-opened impeller pump with a transparent casing, they experimentally observed the behavior of entrained air bubbles.…”

Section: Two-phase Testsmentioning

confidence: 99%

“…Starting with the original volute-type centrifugal pumps [31,32,[56][57][58][59][60][61][62][63][64][65][66][67][68][69][70], they cover several research topics including flow pattern recognition, bubble movement visualization, mapping transition boundaries etc. Murakami and Minemura [31,32] experimental study first investigated the gas entrainment effect on the hydraulic pump head of a centrifugal pump visually, and associated the degradation of pump performance with gas-liquid flow pattern inside the rotor. Using a transparent casing, Estevam [62] conducted the first visualization experiment of flow pattern recognition inside a rotating ESP impeller.…”

Section: Flow Pattern Recognitionmentioning

confidence: 99%

“…Several proposed bubble size models for centrifugal pump are either empirical or semi-empirical. They were verified with specific pumps and air/water as working fluids [31,32,39,40]. The generality of these models is questionable.…”

Section: Bubble Sizementioning

confidence: 99%

“…By photographing the bubble dispersion in a pump with a transparent Plexiglas casing, Murakami and Minemura [31,32] (27) Although Equation (27) is based on rotational speed (N) and inlet GVF, the empirical nature limited its applicability (λ < 8%, 1000 < N < 1500 rpm). Another model of bubble size in a centrifugal pump was proposed by Estevam [64] based on analogy to gas-liquid two-phase pipe flow.…”

Section: Bubble Sizementioning

confidence: 99%

“…A similar trend of d b versus λ G is used by Barrios [39] and Gamboa [40] to correlate the experimental measurement of bubble diameters. However, the linear relationship of d b versus λ G is applied by Murakami and Minemura [31,32], and Zhu and Zhang [105] studies, where a good agreement between the model predicted d b against either visualization experiments or CFD simulation results can be reached. Although several models are available in literature for bubble size prediction in a centrifugal pump with rotating turbulent flow, their empirical/semi-empirical natures limited the range of applications.…”

Section: Bubble Sizementioning

confidence: 99%

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A Review of Experiments and Modeling of Gas-Liquid Flow in Electrical Submersible Pumps

Zhu

Zhang

2018

Energies

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As the second most widely used artificial lift method in petroleum production (and first in produced amount), electrical submersible pump (ESP) maintains or increases flow rate by converting kinetic energy to hydraulic pressure of hydrocarbon fluids. To facilitate its optimal working conditions, an ESP has to be operated within a narrow application window. Issues like gas involvement, changing production rate and high oil viscosity, greatly impede ESP boosting pressure. Previous experimental studies showed that the presence of gas would cause ESP hydraulic head degradation. The flow behaviors inside ESPs under gassy conditions, such as pressure surging and gas pockets, further deteriorate ESP pressure boosting ability. Therefore, it is important to know what parameters govern the gas-liquid flow structure inside a rotating ESP and how it can be modeled. This paper presents a comprehensive review on the key factors that affect ESP performance under gassy flow conditions. Furthermore, the empirical and mechanistic models for predicting ESP pressure increment are discussed. The computational fluid dynamics (CFD)-based modeling approach for studying the multiphase flow in a rotating ESP is explained as well. The closure relationships that are critical to both mechanistic and numerical models are reviewed, which are helpful for further development of more accurate models for predicting ESP gas-liquid flow behaviors.

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Section: Two-phase Testsmentioning

confidence: 99%

Section: Flow Pattern Recognitionmentioning

confidence: 99%

Section: Bubble Sizementioning

confidence: 99%

Section: Bubble Sizementioning

confidence: 99%

Section: Bubble Sizementioning

confidence: 99%

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A Review of Experiments and Modeling of Gas-Liquid Flow in Electrical Submersible Pumps

Zhu

Zhang

2018

Energies

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Drift‐flux model for gas–liquid flow subjected to centrifugal fields

et al. 2021

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Centrifugal pumps are used in several industrial processes. It is common the operation of this equipment with gas-liquid mixtures, which is the case of the electrical submersible pumping artificial lift method used in the oil industry. The increase of free gas fraction inside the pump may lead to unstable operation and problems such as surging and gas locking phenomena to occur. In this study a drift-flux model is proposed for the gas-liquid flow subjected to centrifugal fields using the impeller as an example. The model is closed with experimental data of bubble diameter, displacements and velocities acquired via high-speed camera at several different rotational speeds and gas mass flow rates using water as the continuous medium. From the modeling and the forces balance in the bubbles, quantitative criteria for the start point of surging and gas locking conditions were proposed.

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Recent progress in multiphase flow simulation through multiphase pumps

et al. 2020

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The multiphase flow pumps cover a wide range of industrial sectors extending across petrochemical, metallurgy, and dredging, chemical industry, paint, and construction. The major application is the handling of wet gas and vapor that will condense partially during the compression stage. The main progress in the area of multiphase pumps has been the innovation of a computational fluid dynamics (CFD) numerical approach to simulate three‐dimensional flows inside the pump and to predict pump performance. CFD undoubtedly constitutes one of the most promising approaches for the design, analysis, and performance assessment of complex machines. However, practical application of the CFD tool to determine the internal flow field in multiphase pumps is still far from reality owing to the limitations of a detailed three‐dimensional model of the pump and accuracy of multiphase flow simulation. This review accentuates the influence of different geometrical and dynamical parameters on the performance of the pump and the use of CFD simulation to predict the detailed flow patterns of fluid mixtures. CFD analysis has unearthed the fact that the pattern of inner flow varies with the flow rate and concentration of each phase and the rotation speed of the impeller and number of blades were also found to considerably impact pump performance.

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Effects of Entrained Air on the Performance of Centrifugal Pumps : 2nd Report, Effects of number of blades

Cited by 82 publications

References 0 publications

A Review of Experiments and Modeling of Gas-Liquid Flow in Electrical Submersible Pumps

A Review of Experiments and Modeling of Gas-Liquid Flow in Electrical Submersible Pumps

Drift‐flux model for gas–liquid flow subjected to centrifugal fields

Recent progress in multiphase flow simulation through multiphase pumps

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