Two-phase flow characterization in a split vane impeller Electrical Submersible Pump

Pirouzpanah, Sahand; Gudigopuram, Sujan R.; Morrison, Gerald L.

doi:10.1016/j.petrol.2016.09.051

Cited by 34 publications

(9 citation statements)

References 13 publications

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“…Energies 2018, 11, 1069 14 of 16 (2) Due to the rotation of the impeller and the rotor-stator interaction, the interphase forces of drag, added mass, and lift near the inlet and outlet of the impeller increased significantly. Meanwhile, with the increased IGVF, the variation range of interphase forces in the impeller was greater than that in the guide vane.…”

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confidence: 99%

Study of the Gas Distribution in a Multiphase Rotodynamic Pump Based on Interphase Force Analysis

Zhang

Zahid

et al. 2018

Energies

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Abstract:The performance of multiphase pumps has a remarkable influence on the related industrial application. In order to understand the flow field and gas-liquid phase interaction characteristics of a multiphase rotodynamic pump, detailed numerical analysis of the pump with a medium of air-water combination was carried out for the whole flow passage by means of a structured mesh using ICEM_CFD and TurboGrid. The results for 21% inlet gas void fraction (IGVF = 21%) condition showed that the magnitude ratio of non-drag forces to drag in impeller and guide vane passages was generally less than 1, whereas it was always less than 0.2 for the magnitude ratio of turbulent dispersion force to drag. When the IGVF was increased, the variation range of interphase forces in the impeller was greater than that in the guide vane. In addition, the gas in the impeller mainly accumulated near the suction surface in the outlet region. Further, with increased IGVF, the degree of aggregation increased as well as the gas inhomogeneity, and consequently the interphase forces in the impeller increased. Due to the divergent structure of the guide vane, obvious vortexes emerged at the hub and gradually moved toward the blade pressure surface along the streamwise direction.

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confidence: 99%

Study of the Gas Distribution in a Multiphase Rotodynamic Pump Based on Interphase Force Analysis

Zhang

Zahid

et al. 2018

Energies

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“…Two-phase flow characteristics will change under conditions of different IGVF in a multiphase rotodynamic pump (Caridad, Asuaje, Kenyery, Tremante, & Aguillón, 2008;Pirouzpanah, Gudigopuram, & Morrison, 2017). In this work, the distribution of bubbles is analyzed when IGVF is respectively 5%, 10%, and 15%, while d 0 is kept as 0.4 mm.…”

Section: Sensitivity Of Bubble Distribution To Igvfmentioning

confidence: 99%

Analysis of bubble distribution in a multiphase rotodynamic pump

Zhang

et al. 2019

Engineering Applications of Computational Fluid Mechanics

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Recent researches show that the pressure increment of a multiphase pump is affected by bubble size and distribution. In order to study the bubble distribution characteristics in such pumps, a novel approach describing the variable bubble size in the pump is proposed. The bubble number density equation, which has taken into account the phenomena of break-up and coalescence, is introduced into the flow simulation, and the drag coefficient is revised because of the interaction of multiple bubbles. The reliability of the approach is verified by comparison with the experiment. It was established that the bubbles move to the impeller hub due to the difference in centrifugal force between gas and liquid. Despite the high collision rate near the hub, bubble size changes little with the stirring action of the impeller. The mixture flows in a disorderly way and the bubble diameter increases due to the rotor-stator interaction. Owing to the increasing flow area in the diffuser, bubbles move to the mainstream region, and bubble size reaches its maximum owing to the flow separation near the hub. The distribution of bubbles is also analyzed under a different inlet gas volume fraction (IGVF) and inlet bubble diameter (d 0). Bigger IGVF brings about a higher collision rate of bubbles, while smaller d 0 makes the diffusion of bubbles easier.

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“…The model is used to evaluate head rise per stage under two-phase flow conditions. Pirouzpanah [8] developed a two-phase flow prediction model for split vane impeller pumps based on the concept of homogeneous head. The model utilizes dimensional analysis with head degradation, comparing with head developed for single-phase flow using head ratio.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation and Dimensional Analysis of Multistage Helicoaxial Pump for Two-Phase Flow

Patil

Gudigopuram

Ayyildiz

et al. 2019

IJTPP

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A four stage helicoaxial pump was tested under varying operating conditions. A range of inlet pressures, rotational speeds (3000, 3600 rpm), and gas void fractures (GVFs) were considered for two fluid viscosities. The head developed and power input to run the pump were recorded. Head, power input and efficiency decrease as the GVF increases with best efficiency point (BEP) moving towards lower flow rate conditions. Dimensional analysis was conducted to evaluate the applicability of current affinity laws to the two-phase flow performance of the pump under consideration. Dimensionless head coefficient and power coefficients were defined for two-phase flow, considering the homogeneity in the two-phase fluid properties. Deviations in the two-phase affinity coefficients from the common law curve increases with GVF. To bridge this gap, a new correlation is proposed with a revised flow coefficient that allows all the head coefficient data to collapse on a single line with a greater degree of accuracy.

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Two-phase flow characterization in a split vane impeller Electrical Submersible Pump

Cited by 34 publications

References 13 publications

Study of the Gas Distribution in a Multiphase Rotodynamic Pump Based on Interphase Force Analysis

Study of the Gas Distribution in a Multiphase Rotodynamic Pump Based on Interphase Force Analysis

Analysis of bubble distribution in a multiphase rotodynamic pump

Performance Evaluation and Dimensional Analysis of Multistage Helicoaxial Pump for Two-Phase Flow

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