Research on transient dynamic characteristics of three-stage axial-flow multi-phase pumps influenced by gas volume fractions

Liu, Xiaobing; Hu, Quanyou; Shi, Guangtai; Zeng, Yongchun; Wang, Huiyan

doi:10.1177/1687814017737669

Cited by 11 publications

(7 citation statements)

References 9 publications

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“…For single-phase pumps, many factors cause pressure fluctuation, including cavitation, flow separation, vortex hand, and rotor-stator interaction but the rotor-stator interaction is viewed as the major cause (Miorini et al, 2012). However, for gas-liquid two-phase pumps, the flow is usually more disordered due to the phase interaction between the two phases effecting the fluctuation in such pumps (Liu et al, 2017a;Ma et al, 2018;Yu et al, 2014). Many studies on the pressure fluctuation in single-phase pumps have been conducted or even carried out in-depth cavitation analysis in recent years, including for centrifugal pumps (González et al, 2006;Liu et al, 2017b;Majidi, 2005), axial flow pumps (Feng et al, 2016;Shuai et al, 2014;Xie et al, 2018) and mixed-flow pumps (Miyabe et al, 2006;Xu et al, 2017;Zhang et al, 2017b).…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of pressure fluctuation in a multiphase rotodynamic pump with air–water two-phase flow

Zhang

et al. 2019

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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Pressure fluctuation in single-phase pumps has been studied widely, while less attention has been paid to research on multiphase pumps that are commonly used in the petroleum chemical industry. Therefore, this study investigates the pressure fluctuation for a multiphase rotodynamic pump handling air–water two-phase flow. Simulations based on the Euler two-fluid model were carried out using ANSYS_CFX16.0 at different Inlet Gas Void Fractions (IGVFs) and various flow rate values. Under conditions of IGVF = 0% (pure water) and IGVF = 15%, the accuracy of the numerical method was tested by comparing the experimental data. The results showed that the rotor–stator interaction was still the main generation driver of pressure fluctuation in gas–liquid two-phase pumps. However, the fluctuation near the impeller outlet ascribe to the rotor–stator interaction was weakened by the complex gas–liquid flow. For the different IGVF, the variation trend of fluctuation was similar along the streamwise direction. That is, the fluctuation in the impeller increased before decreasing, while in the guide vane it decreased gradually. Also, the fluctuation in the guide vane was generally greater than for the impeller and the maximum amplitude appeared in the vicinity of guide vane inlet.

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Section: Introductionmentioning

confidence: 99%

Numerical analysis of pressure fluctuation in a multiphase rotodynamic pump with air–water two-phase flow

Zhang

et al. 2019

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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“…Liu et al 44 conclude on the situation of multiphase transportation inside an axial‐flow type pump in unstable conditions at high GVFs and high‐speed. The vibration in the pump is attributed to the transient dynamic characteristics of the unsteady flow in the pump.…”

Section: Computational Simulation Of Fluid Flowmentioning

confidence: 99%

“…Unsteady distribution of total radial force on guide vanes 44 [Color figure can be viewed at wileyonlinelibrary.com]…”

Section: Computational Simulation Of Fluid Flowmentioning

confidence: 99%

“…Liu et al 44 computational study was conducted by the SIMPLEC algorithm using the structured grid division technology, the standard wall equation, and the transient dynamic behavior of the pump at various GVF. They found that as the force acting on the center increases corresponding to the increase in GVFs, the coercing action of the impeller decreases and the dynamic reaction on the blades decreases.…”

Section: Helico-axial Pumpmentioning

confidence: 99%

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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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“…Some research works related to pressurization performance can be found in the literature. [6][7][8][9][10][11] These studies can provide references for the study of pressurization performance in an impeller within a multi-phase pump.…”

Section: Introductionmentioning

confidence: 99%

Research on the pressurization performance of an impeller in a multi-phase pump under different working conditions

Shi

Wang

et al. 2019

Advances in Mechanical Engineering

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In order to improve the working performance of the impeller in a multi-phase pump under different working conditions and expand the range of the high-efficiency areas of the multi-phase pump, each section of the impeller was divided into an inlet section, middle section and outlet section. The pressurization performance of different areas within the impeller was obtained by numerical calculation under different flow rates and different gas volume fractions, respectively. The results show that the pressurization performance of the different areas within the impeller can be predicted well. In the first half of the impeller, when the blades were closer to the rim, the pressurization performance was stronger, and in the second half of the impeller, when the blades were closer to the hub, the pressurization performance was stronger. With an increase in the flow rate, from the inlet section to the outlet section, the pressurization performance of each stage of the impeller gradually decreased, and the strongest pressurization performance area was always in the inlet section with no obvious movement. With the increase in the gas volume fractions, the pressurization value of each stage of the impeller dropped faster, except for the outlet section. When there was an increase in the flow rate or the gas volume fraction, the inlet section was influenced the most and the outlet section was influenced the least. The research results provide an important theoretical basis for further optimization of the impeller design for a multi-phase pump.

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Research on transient dynamic characteristics of three-stage axial-flow multi-phase pumps influenced by gas volume fractions

Cited by 11 publications

References 9 publications

Numerical analysis of pressure fluctuation in a multiphase rotodynamic pump with air–water two-phase flow

Numerical analysis of pressure fluctuation in a multiphase rotodynamic pump with air–water two-phase flow

Recent progress in multiphase flow simulation through multiphase pumps

Research on the pressurization performance of an impeller in a multi-phase pump under different working conditions

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