A novel experimental facility for measuring internal flow of Solid-liquid two-phase flow in a centrifugal pump by PIV

The objective of this paper is to apply combined experimental and computational modeling to investigate the influence of different coating thickness on the operation characteristics of solid–liquid two-phase flow centrifugal pump. According to the characteristics of sediment flow in the Yellow River Basin, the effects of polyurethane coating thickness on the energy performance and pressure fluctuation are analyzed under the condition of solid–liquid two-phase flow and clean water. Meanwhile, the internal flow characteristics and radial force of the coated pump under the condition of solid–liquid two-phase flow are studied. The results show that the blade inlet and outlet of impeller are easy to wear, and the pressure fluctuation at the outlet of the model pump can be reduced by spraying proper coating thickness. The model pump with coating increases the low-speed zone of internal flow, which is mainly due to the increase of the viscous bottom layer area. The variation amplitude of radial force in sediment-laden water decreases with the increase of coating thickness.

Download Full-text

The research on particle trajectory of solid-liquid two-phase flow and erosion predicting in screw centrifugal pump

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/129/1/012052 ◽

2016 ◽

Vol 129 ◽

pp. 012052 ◽

Cited By ~ 4

Author(s):

Z J Shen ◽

R N Li ◽

W Han ◽

W G Zhao ◽

X H Wang

Keyword(s):

Centrifugal Pump ◽

Particle Trajectory ◽

Two Phase Flow ◽

Phase Flow ◽

Two Phase ◽

Solid Liquid

Download Full-text

Study on the Effects of the Wear-Rings Clearance on the Solid-Liquid Two-Phase Flow Characteristics of Centrifugal Pumps

Symmetry ◽

10.3390/sym12122003 ◽

2020 ◽

Vol 12 (12) ◽

pp. 2003

Author(s):

Chaoshou Yan ◽

Jianfei Liu ◽

Shuihua Zheng ◽

Bin Huang ◽

Jiacheng Dai

Keyword(s):

Numerical Simulation ◽

Centrifugal Pump ◽

Two Phase Flow ◽

Phase Flow ◽

Centrifugal Pumps ◽

Suction Surface ◽

Two Phase ◽

Wear Area ◽

Fluid Medium ◽

Solid Liquid

In order to study the wear law of the centrifugal pump flowing surface under different wear-rings clearance, the McLaury wear model was used to conduct the full-passage numerical simulation of solid-liquid two-phase flow in a single-stage single-suction centrifugal pump. The reliability of the numerical calculation method is verified by comparing the experimental data and numerical simulation results. The clearance is 0.1, 0.15, 0.2, 0.3 and 0.5 mm, respectively. The results show that the wear of the centrifugal pump blades is mainly concentrated in the end part and the inlet part of the blade, and the wear of the pressure surface at the end of the suction surface and the front of the blade is more serious. As the clearance increases, the maximum wear value in the impeller increases first and then decreases, reaching a maximum at 0.15 mm. With the increase of the clearance, the wear degree and the wear rate of the volute wall surface first increase and then decrease, and reach the maximum at 0.2 mm. With the increase of the clearance and the concentration of the fluid medium, the wear at the clearance of the centrifugal pump is more serious, and the severe wear area exhibits a point-like circumferential distribution.

Download Full-text

Influence of grooved volute casing parameters on pressure pulsation and erosion wear characteristics in a centrifugal pump

Modern Physics Letters B ◽

10.1142/s0217984921505564 ◽

2022 ◽

Author(s):

Zhengjing Shen ◽

Wei Han ◽

Yiming Zhong ◽

Bo Luo ◽

Rennian Li ◽

...

Keyword(s):

Centrifugal Pump ◽

Pressure Pulsation ◽

Internal Flow ◽

Phase Flow ◽

Erosion Wear ◽

Flow Conditions ◽

Two Phase ◽

Wear Characteristics ◽

Groove Structure ◽

Solid Liquid

Previous work has shown that performance and internal flow characteristics of a centrifugal pump can be significantly improved with grooved volute casing (GVC). However, it has been found that the selection of the design parameters of the groove structure also has a direct impact on the performance output, internal flow pressure pulsation and erosion wear characteristics of the overflow components of centrifugal pump, so it is necessary to further analyze the design rules of the groove structure parameters. In this study, we first investigated the influence of the number of grooves on the head, efficiency and unsteady pressure pulsation characteristics of the internal flow field of the centrifugal pump, and on this basis, the correlation between different particle parameters and the erosion wear of key overflow components under the conditions of solid–liquid two-phase flow were also studied, and the erosion wear characteristics of the inner wall of the volute casing of centrifugal pump with GVC and original volute casing (OVC) structures were compared. This research leads to the conclusion that when the number of grooves is 3, the groove structure has the least influence on the performance of the centrifugal pump, and the overall change of the performance curve is more stable. Additionally, the pressure pulsation at each monitoring point of the GVC under the same flow condition is smaller, and when the number of grooves increases, the pressure pulsation amplitude also decreases. When the number of grooves is 3, the GVC shows a more significant flow improvement effect under all flow conditions. Based on the improvement of the groove structure on the flow stability, the particle motion behavior can be affected at the same time, so that the pump with GVC can mitigate the erosion wear of the inner wall of the volute casing under the solid–liquid two-phase flow conditions, which improves the critical performance and service life of the key overflow components of the pump.

Download Full-text

Computational analysis of centrifugal pump delivering solid-liquid two-phase flow during startup period

Chinese Journal of Mechanical Engineering ◽

10.3901/cjme.2014.01.178 ◽

2014 ◽

Vol 27 (1) ◽

pp. 178-185 ◽

Cited By ~ 10

Author(s):

Yuliang Zhang ◽

Yi Li ◽

Zuchao Zhu ◽

Baoling Cui

Keyword(s):

Centrifugal Pump ◽

Computational Analysis ◽

Two Phase Flow ◽

Phase Flow ◽

Two Phase ◽

Startup Period ◽

Solid Liquid

Download Full-text

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

Shock and Vibration ◽

10.1155/2021/6631981 ◽

2021 ◽

Vol 2021 ◽

pp. 1-10

Author(s):

Yanping Wang ◽

Bozhou Chen ◽

Ye Zhou ◽

Jianfeng Ma ◽

Xinglin Zhang ◽

...

Keyword(s):

Particle Size ◽

Internal Pressure ◽

Centrifugal Pump ◽

Fine Particle ◽

Volume Concentration ◽

Two Phase Flow ◽

Solid Particles ◽

Phase Flow ◽

Two Phase ◽

Solid Liquid

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.

Download Full-text