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

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

doi:10.1016/j.expthermflusci.2015.08.013

Cited by 124 publications

(60 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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%

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

Zhang

Zahid

et al. 2018

Energies

Self Cite

View full text Add to dashboard Cite

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.

show abstract

mentioning

confidence: 99%

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

Zhang

Zahid

et al. 2018

Energies

Self Cite

View full text Add to dashboard Cite

show abstract

“…Gas pockets still exist, but they are covered by the white region and cannot be observed clearly. The detailed analysis from the visualization experiment is presented in Zhang et al 23 Position analysis of gas pockets. When the flow pattern is gas pocket flow, gas pockets can be clearly observed from both the simulation and the experiment, as shown in Figures 15 and 16.…”

Section: Analysis Of the Resultsmentioning

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

Self Cite

View full text Add to dashboard Cite

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.

show abstract

“…The liquid phase is gravitationally discharged to the bottom of the separator and the gas phase, on the other hand, is discharged to the atmosphere. The principle and operation of the LRVP were also described by the authors of the papers indicated under [28][29][30].…”

Section: Description Of Seps and Lrvp Of A Condensing Steam Turbinementioning

confidence: 99%

Energy efficiency analysis of steam ejector and electric vacuum pump for a turbine condenser air extraction system based on supervised machine learning modelling

et al. 2016

View full text Add to dashboard Cite

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

Cited by 124 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

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

Energy efficiency analysis of steam ejector and electric vacuum pump for a turbine condenser air extraction system based on supervised machine learning modelling

Contact Info

Product

Resources

About