Numerical simulation and analysis of solid-liquid two-phase three-dimensional unsteady flow in centrifugal slurry pump

Wu, Bo; Wang, Xili; Liu, Hui; Xu, Hui

doi:10.1007/s11771-015-2837-7

Cited by 26 publications

(13 citation statements)

References 6 publications

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“…The Eulerian model in the multiphase flow model is selected for numerical simulation. The solid-liquid two-phase flow control equation based on the Eulerian model mainly includes continuity and momentum equations (Li, Xu, & Yang, 2015;Makogon, 2010;Wu, Wang, Liu, & Xu, 2015).…”

Section: Control Equationsmentioning

confidence: 99%

Hydraulic transport flow law of natural gas hydrate pipeline under marine dynamic environment

Chen

2020

Engineering Applications of Computational Fluid Mechanics

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The work simulates the transport pipeline movement of the marine dynamic environment based on the computational fluid dynamics research method. The present work also studies the influence of the marine dynamic environment on the solid-liquid two-phase flow field in the pipeline. An experimental study on the hydraulic transport flow law of natural gas hydrate pipeline is performed on the experimental platform of deep-sea mining metallogenic system fluctuation. Results show a large disturbance of the transverse swing convection field of pipelines and a small influence of axial vibration. The flow field distribution characteristics in the conveyor pipeline are consistent with the steadystate working conditions when the amplitude of transverse oscillation is less than 0.5 m. When the oscillation amplitude is larger than 2 m, the vibration has a considerable influence on the solid-phase distribution, solid-liquid two-phase velocity, dynamic and static pressure, and pressure loss of the flow field in the conveying system. The flow field distribution is chaotic when the transverse oscillation period of the pipeline is small. This condition becomes highly evident when the oscillation amplitude is large.

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Section: Control Equationsmentioning

confidence: 99%

Hydraulic transport flow law of natural gas hydrate pipeline under marine dynamic environment

Chen

2020

Engineering Applications of Computational Fluid Mechanics

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“…Up to now, the influence of dense fine particles on the flow field in centrifugal pump is still unclear, and the mechanism of dense fine particles solid-liquid two-phase centrifugal pump has not been revealed. Compared with the low concentration solid-liquid two-phase flow, the force of liquid and solid phase in high concentration solid-liquid two-phase flow is stronger [6][7][8][9]. e liquid-phase flow drives the movement of solid particles, and the loss of momentum and turbulent kinetic energy of solid particles in turn affects the liquid-phase flow.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Fine Particle Solid-Liquid Two-Phase Flow in a Centrifugal Pump

Wang

Chen

Zhou

et al. 2021

Shock and Vibration

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To study the effect of fine particle size and volume concentration on the performance of solid-liquid two-phase centrifugal pump, the mixture multiphase flow model, RNG k-ε turbulence model, and SIMPLEC algorithm were used to simulate the two-phase flow of the centrifugal pump. The effects of particle size and volume concentration on internal pressure distribution, solid volume distribution, and external characteristics were analyzed. The results show that under the design discharge conditions, with the increase of particle size and volume concentration, the internal pressure of the flow field will decrease, and the volume fraction of solid phase in the impeller passage will also decrease as a whole. The solid particles gradually migrate from the suction surface to the pressure surface, and the particles in the volute channel are mainly concentrated in the flow channel near the outlet side of the volute. With the increase of particle size and volume concentration, the negative pressure value at the inlet of centrifugal pump increases, the total pressure difference at the inlet and outlet decreases, and the head and efficiency decrease accordingly.

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“…In the process of conveying particles, due to the collision between the particles and the components in the pump (such as impeller and volute), the components in the pump are worn out [5]. e presence of particles will destroy the original flow field and the protective layer of the wall, resulting in performance degradation and wear damage [6][7][8][9][10], which further leads to frequent replacement or maintenance, and the corresponding conveying system needs to be stopped, thus leading to the significant increase of the conveying costs. e research of Wilson et al [11] showed that the shutdown cost of a large mine is about 1 × 10 5 $/hour.…”

Section: Introductionmentioning

confidence: 99%

Wear Characteristics of Dense Fine Particles Solid-Liquid Two-Phase Fluid Centrifugal Pump with Open Impellers

Wang

Han

Zhou

et al. 2021

Shock and Vibration

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The demand for a centrifugal pump with open impellers for conveying dense fine particles in solid-liquid two-phase flow has increased significantly in actual engineering. The wear of dense fine particles on the centrifugal pump is also exceedingly prominent, which affects the engineering efficiency and economic benefits. The two-phase flow in the open centrifugal pump is three-dimensional and unsteady; the movement of high-volume concentration particles in the centrifugal pump and its mutual influence on the two-phase flow, which results in the calculation of wear, are very intricate. To study the wear characteristics of the centrifugal pump with open impeller with high-volume concentration particles more accurately, numerical simulation and experimental comparison are carried out for the impeller wear of dense fine particles transported by the centrifugal pump with open impellers. Considering the relationship between particles and walls, we used the Fluent 18.0 built-in rebound function and wear model. The RNG k-ε model and the DDPM model were adopted in the numerical simulation, and the numerical solution for centrifugal pump wear was performed under flow rate (9.6 m3·h−1, 12.8 m3·h−1, 16 m3·h−1, and 19.2 m3·h−1), different particle sizes (0.048 mm, 0.106 mm, 0.15 mm, 0.27 mm, and 0.425 mm), and different particle volume concentrations (10%, 15%, 20%, 25%, and 30%), respectively. By comparing the serious wear positions of the impeller, the experimental results correspond well with the numerical simulation, which can be used to predict and study the wear characteristics of the impeller. The results show that the most serious area of blade wear is the middle part of the pressure surface, followed by the middle part of the upper part of the blade. The wear of the impeller is greatly affected by relevant parameters, such as pump flow rate, particle diameter, and particle volume concentration. These results can provide some basis for the wear-resistant design of dense fine particle impeller.

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Numerical simulation and analysis of solid-liquid two-phase three-dimensional unsteady flow in centrifugal slurry pump

Cited by 26 publications

References 6 publications

Hydraulic transport flow law of natural gas hydrate pipeline under marine dynamic environment

Hydraulic transport flow law of natural gas hydrate pipeline under marine dynamic environment

Numerical Simulation of Fine Particle Solid-Liquid Two-Phase Flow in a Centrifugal Pump

Wear Characteristics of Dense Fine Particles Solid-Liquid Two-Phase Fluid Centrifugal Pump with Open Impellers

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