Experimental investigation of the flow at the entrance of a rotodynamic multiphase pump by visualization

Zhang, Jinya; Cai, Shujie; Zhu, Hongwu; Zhang, Yongxue

doi:10.1016/j.petrol.2014.12.017

Cited by 61 publications

(27 citation statements)

References 12 publications

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“…In order to ensure the safety of experiment and the reusability of equipment, air-water was used as the working medium. In the experiment, water that flowed out from the water tank was mixed evenly with the air provided by a compressor in a swirling mixer [11], then they entered the pump. The gas and water flowed back to the water tank after experiencing the work behavior of the multiphase pump, and then the gas spilled out from the water tank.…”

Section: Test Systemmentioning

confidence: 99%

“…Meanwhile, Zhang et al [10,11] found that the relationship between bubble number and bubble size obeyed a normal distribution in the inlet region of a rotodynamic multiphase pump, and the bubble size increased with increased IGVF while it decreased with increased rotational speed. Overall, the experimental studies for gas-liquid multiphase pumps were focused on the external characteristics (efficiency, head, etc.)…”

mentioning

confidence: 99%

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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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Section: Test Systemmentioning

confidence: 99%

mentioning

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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“…In addition, in order to decrease the errors in the experiment, five pictures were taken randomly after the flow became stable. One hundred bubbles were selected at random in every picture to calculate the bubble size [18]. The camera was set to operate at 5000 frames per second, with an image resolution of 1080 Â 800 pixels.…”

Section: Flow Analysis At the Entry Sectionmentioning

confidence: 99%

Visualization study of gas–liquid two-phase flow patterns inside a three-stage rotodynamic multiphase pump

Zhang

Cai

et al. 2016

Experimental Thermal and Fluid Science

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124

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“…The inlet boundary condition of bubbly flow type is assumed to study the gas-liquid two-phase flow field of the pump. According to the research result in Zhang et al, 22 the bubble at the entrance of the flow field is considered as spherical, its average diameter is set, respectively, to be from 0.1 to 2.5 mm for different IGVF conditions, and the surface tension coefficient between gas and liquid is set as 0.073 N/m.…”

Section: Fluid Definitionsmentioning

confidence: 99%

Investigation of gas–liquid two-phase flow in a three-stage rotodynamic multiphase pump via numerical simulation and visualization experiment

Zhang

Cai

et al. 2016

Advances in Mechanical Engineering

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To investigate the gas-liquid two-phase flow in a three-stage multiphase pump, numerical simulations and visualization experiments were performed. A mixture of air and water was selected as the medium. A three-dimensional flow field of the three-stage multiphase pump designed by authors was simulated employing the commercial computational fluid dynamics software ANSYS-CFX to solve the Navier-Stokes equations for steady flow and unsteady flow. The differential pressure of each stage and change characteristic of gas volume fraction under various inlet gas volume fraction were compared via steady simulations. The distribution characteristics of pressure and gas volume fraction in three stages were studied, and the movement of gas pockets in impellers was discovered via unsteady simulations as well. Four types of flow patterns were observed during the visualization experiments with the increasing inlet gas volume fraction. The results of the experiment reveal that the positions and characteristics of the gas pocket were similar to the results from the unsteady simulations, which verify the reliability of the simulations.

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Experimental investigation of the flow at the entrance of a rotodynamic multiphase pump by visualization

Cited by 61 publications

References 12 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

Visualization study of gas–liquid two-phase flow patterns inside a three-stage rotodynamic multiphase pump

Investigation of gas–liquid two-phase flow in a three-stage rotodynamic multiphase pump via numerical simulation and visualization experiment

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