Numerical Study of the Performance Loss of A Centrifugal Pump Carrying Emulsion

Achour, Lila; Specklin, Mathieu; Belaidi, Idir; Kouidri, S.

doi:10.1051/e3sconf/202132101010

Cited by 7 publications

(2 citation statements)

References 13 publications

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“…The second crucial result was that the effective viscosities observed at the outlet section and the volute were significantly higher than those observed at the rotating region for the region 1 emulsions fitted to the Cross model, for all flow rates considered, as shown in Figure 11 a. In sum, higher viscosities were observed away from the impeller due to the lower shears exerted on the fluid in this region [ 29 ]. In this figure, it can be seen, for example, that the maximum viscosity of emulsion 50O50W at the impeller was about 1.24 × 10 −5 m 2 /s 2 , while its upper limit in the volute reached 1.91 × 10 −5 m 2 /s 2 .…”

Section: Resultsmentioning

confidence: 99%

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Numerical Assessment of the Hydrodynamic Behavior of a Volute Centrifugal Pump Handling Emulsion

Achour

Specklin

Belaidi

et al. 2022

Entropy

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Although emulsion pumping is a subject of growing interest, a detailed analysis of the fluid dynamic phenomena occurring inside these machines is still lacking. Several computational investigations have been conducted to study centrifugal pumps carrying emulsion by analyzing their overall performance, but no studies involved the rheological behavior of such fluids. The purpose of this study is to perform a computational analysis of the performance and flow characteristics of a centrifugal pump with volute handling emulsions and oil–water mixtures at different water cuts modeled as a shear-thinning non-Newtonian fluid. The studied pump consists of a five-bladed backward curved impeller and a volute and has a specific speed of 32 (metric units). The rheological properties of the mixtures studied were measured experimentally under a shear rate ranging from 1 s−1 to 3000 s−1 and were fitted to conventional Cross and Carreau effective viscosity models. Numerical results showed the flow topology in the pump is directly related to the viscosity plateau of the pseudoplastic behavior of emulsions. The viscosity plateau governs pump performance by influencing the loss mechanisms that occur within the pump. The larger the ν∞, the less recirculation loss the fluid experiences, and conversely, the smaller the value of ν0, the less friction loss the fluid experiences.

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Section: Resultsmentioning

confidence: 99%

“…The numerical simulations were performed using a RANS approach for turbulence modeling. This work is an extension of the previous work [29]. The scope of the previous work was an analytical and CFD analysis of the performance of a centrifugal pump handling a concentrated oil-in-water emulsion (40O60W).…”

Section: Introductionmentioning

confidence: 97%

Numerical Assessment of the Hydrodynamic Behavior of a Volute Centrifugal Pump Handling Emulsion

Achour

Specklin

Belaidi

et al. 2022

Entropy

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Features of improving the design of bladed impellers for operation on gas-liquid mixtures

Trulev¹,

Timushev

Lomakin

2022

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The article analyzes the flow gas-liquid mixture features inthe flow part of the impellers of multiphase stages pumping gas-liquid mixtures. By analogy with the coefficient specific speed of a pump for a single-phase liquid and the cavitation specific speed, a specific speed for multiphase pump stages is proposed. It is shown that the operation of blade pumps on multiphase media depends on the characteristics of the flow of the working fluid in all parts of the flow path, including the conditions at the inlet to the impeller, the flow in the blade cascade of the impeller, the guide vane, the outlet elements of the pump. Design changes in traditional blade cascades are recommended, and a new type is proposed: a multi-row cascade system.

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Design Features of Impeller Vane Cascades to Pump Gas and Liquid Mixtures Conducive to Reducing Gas Cavern Magnitudes

Trulev¹,

Lomakin

Klindukh

et al. 2022

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We employed numerical simulation methods to investigate how design features of impeller vane cascades in a centrifugal pump processing gas and liquid mixtures will affect the magnitude of gas caverns. We derived a mathematical model for multiphase flow of incompressible fluid. We performed hydrodynamic computations for various impeller vane cascade designs. We identified regions of local gas separation in commercially available and improved cascades that may result in gas plug formation and pump failure. The paper investigates the effect of the following parameters on the magnitude of a gas cavern: the angle of attack, pressure feed, pressure gradient, and the presence of through holes and transverse cutouts in a single-tier vane cascade. We consider design features of stacked van cascades and investigate how the vane length and vane distribution uniformity in the blading section of a stacked vane system affect gas cavern magnitudes. We selected the optimum vane cascade design for multiphase impellers. The paper then indicates further lines of research.

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Numerical Study of the Performance Loss of A Centrifugal Pump Carrying Emulsion

Cited by 7 publications

References 13 publications

Numerical Assessment of the Hydrodynamic Behavior of a Volute Centrifugal Pump Handling Emulsion

Numerical Assessment of the Hydrodynamic Behavior of a Volute Centrifugal Pump Handling Emulsion

Features of improving the design of bladed impellers for operation on gas-liquid mixtures

Design Features of Impeller Vane Cascades to Pump Gas and Liquid Mixtures Conducive to Reducing Gas Cavern Magnitudes

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