Numerical simulation and optimization of solid-liquid two-phase flow in a back-swept axial-flow pump

Zhang, Desheng; Pan, Qiang; Zhang, Hu; Shi, Weidong; Zhang, Rui-Jie; Xing, Jin

doi:10.2298/tsci160310064z

Cited by 7 publications

(3 citation statements)

References 7 publications

(7 reference statements)

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“…Although the testing of two-phase fluid flow is still being intensively studied [34,35], there is still no definite general model describing the process. The constantly evolving methods of analysis allow the verification of emerging numerical models that facilitate the design process of equipment implementing two-phase flow [36], both gas-liquid and gas-solid [37] or even liquid-solid [38].…”

Section: ( )mentioning

confidence: 99%

Application of videogrammetry in the mechanics of multi-phase systems

Anweiler

Ulbrich

2020

THERM SCI

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This paper is a description of the evolution of long-term research work on two-phase flows using parallel studies of dynamic image analysis and stochastic processes analysis. The state of current knowledge on the research of gas-solid and gas-liquid systems as well as a review of research relating to these issues are also presented. The work grants the principles of videogrammetric surveys based on stochastic analysis for a series of photographs taken with video techniques. The method applies the analysis of changes in selected features and parameters in the time domain. Especially in application to multiphase gas-liquid and solid-gas mixture flows, which are characterized by strong variabilities. Parameters such as flow patterns of the mixture were determined as time-space distributions of phase concentration, displacement velocities of separated two-phase structures, volume partitions of phases, and velocity field distributions are evaluated. The changes of certain parameters characterizing the flow in the time domain often hide more useful information. The subject of this study covers the basics of videogrammetry with a description of two-phase mixture motion for co-current flow in channels, mapping of the phase velocity field, also across the tube bundle in shell-and-tube apparatus, phase motion at the flow of a two-phase gas-liquid mixture in mini-channels, transport of liquids in air-lift pump and fluidization of solid particles.

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Section: ( )mentioning

confidence: 99%

Application of videogrammetry in the mechanics of multi-phase systems

Anweiler

Ulbrich

2020

THERM SCI

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“…At present, some progress has been made in numerical simulation of centrifugal pump flow performance [25][26][27][28][29][30][31][32][33][34][35][36]. However, the overall flow performance of the centrifugal pump, especially the two-phase flow performance under the condition of high concentration of fine particles, is not sufficiently studied due to the complexity of solid-liquid two-phase flow in the pump.…”

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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“…A simulation method to analyze the abrasion characteristic of the axial flow pump was proposed using the sewage as media. To verify the correctness of numerical investigation, the result of the 65° back-swept blade model was compared with a sludge axial flow pump in a sewage treatment plant (Zhang et al , 2017).…”

Section: Introductionmentioning

confidence: 99%

Study on the transition process of a molten salt pump transporting media with crystalline particles by modeling test and numerical simulation

Shao

Zhang

et al. 2019

HFF

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Purpose The purpose of this paper is to study the transition process from the crystalline particles appearing before the pump inlet to the stable operation of the pump. Design/methodology/approach Firstly, a modeling test method was put forward for the high-temperature molten salt pump. Then, according to a modeling test scheme, the experiment of the solid–liquid two-phase flow was carried out by using a model pump similar to the prototype pump. Meanwhile, the numerical method to simulate the transition process of a molten salt pump was studied, and the correctness of the numerical model was verified by the experimental results. Finally, the transition process of the molten salt pump was studied by the verified numerical model in detail. Findings In the simulation of the transition process, it is more accurate to judge the end of the transition process based on the unchanged particle volume fraction (PVF) at the pump outlet than on the periodic fluctuation of the outlet pressure. The outlet pressure is closely related to the PVF in the pump. The variation of the outlet pressure is slightly prior to that of the PVF at the pump outlet and mainly affected by the PVF in the impeller and volute. After 0.63 s, the PVF at each monitoring point changes periodically, and the time-averaged value does not change with time. Practical implications This study is of great significance to further improve the design method of molten salt pump and predict the abrasion characteristic of the pump due to interactions with solid particles. Originality/value A numerical method is established to simulate the transition process of a molten salt pump, and a method is proposed to verify the numerical model of two-phase flow by modeling test.

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Numerical simulation and optimization of solid-liquid two-phase flow in a back-swept axial-flow pump

Cited by 7 publications

References 7 publications

Application of videogrammetry in the mechanics of multi-phase systems

Application of videogrammetry in the mechanics of multi-phase systems

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

Study on the transition process of a molten salt pump transporting media with crystalline particles by modeling test and numerical simulation

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