Numerical Investigation of the Characteristics of Erosion in a Centrifugal Pump for Transporting Dilute Particle-Laden Flows

Erosion in centrifugal pumps for transporting flows with dilute particles is a main pump failure problem in many engineering processes. A numerical model combining the computational fluid dynamics (CFD) and Discrete Element Method (DEM) is applied to simulate erosion in a centrifugal pump. Different...

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Main Authors: Rui-Jie Zhao, You-Long Zhao, De-Sheng Zhang, Yan Li, Lin-Lin Geng
Format: Article
Language:English
Published: MDPI AG 2021-09-01
Series:Journal of Marine Science and Engineering
Subjects:
CFD
DEM
Online Access:https://www.mdpi.com/2077-1312/9/9/961
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spelling doaj-b435ee4a4880489999a78b7b8f5309a12021-09-26T00:30:20ZengMDPI AGJournal of Marine Science and Engineering2077-13122021-09-01996196110.3390/jmse9090961Numerical Investigation of the Characteristics of Erosion in a Centrifugal Pump for Transporting Dilute Particle-Laden FlowsRui-Jie Zhao0You-Long Zhao1De-Sheng Zhang2Yan Li3Lin-Lin Geng4Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, ChinaResearch Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, ChinaResearch Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, ChinaResearch Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, ChinaResearch Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, ChinaErosion in centrifugal pumps for transporting flows with dilute particles is a main pump failure problem in many engineering processes. A numerical model combining the computational fluid dynamics (CFD) and Discrete Element Method (DEM) is applied to simulate erosion in a centrifugal pump. Different models of the liquid-solid inter-phase forces are implemented, and the particle-turbulence interaction is also defined. The inertial particles considered in this work are monodisperse and have finite size. The numerical results are validated by comparing the results with a series of experimental data. Then, the effects of particle volume fraction, size, and shape on the pump erosion are estimated in the simulations. The results demonstrate that severe erosive areas are located near the inlet and outlet of the pressure side of the impeller blade, the middle region of the blade, the corners of the shroud and hub of the impeller adjoining to the pressure side of the blade, and the volute near the pump tongue. Among these locations, the maximum erosion occurs near the inlet of the pressure side of the blade. Erosion mitigation occurs under the situation where more particles accumulate in the near-wall region of the eroded surface, forming a buffering layer. The relationship between the particle size and the erosion is nonlinear, and the 1 mm particle causes the maximum pump erosion. The sharp particles cause more severe erosion in the pump because both the frequency of particle-wall collisions and the impact angle increase with the increasing sharpness of the particle.https://www.mdpi.com/2077-1312/9/9/961erosioncentrifugal pumpdilute particle-laden flownumerical simulationCFDDEM
collection DOAJ
language English
format Article
sources DOAJ
author Rui-Jie Zhao
You-Long Zhao
De-Sheng Zhang
Yan Li
Lin-Lin Geng
spellingShingle Rui-Jie Zhao
You-Long Zhao
De-Sheng Zhang
Yan Li
Lin-Lin Geng
Numerical Investigation of the Characteristics of Erosion in a Centrifugal Pump for Transporting Dilute Particle-Laden Flows
Journal of Marine Science and Engineering
erosion
centrifugal pump
dilute particle-laden flow
numerical simulation
CFD
DEM
author_facet Rui-Jie Zhao
You-Long Zhao
De-Sheng Zhang
Yan Li
Lin-Lin Geng
author_sort Rui-Jie Zhao
title Numerical Investigation of the Characteristics of Erosion in a Centrifugal Pump for Transporting Dilute Particle-Laden Flows
title_short Numerical Investigation of the Characteristics of Erosion in a Centrifugal Pump for Transporting Dilute Particle-Laden Flows
title_full Numerical Investigation of the Characteristics of Erosion in a Centrifugal Pump for Transporting Dilute Particle-Laden Flows
title_fullStr Numerical Investigation of the Characteristics of Erosion in a Centrifugal Pump for Transporting Dilute Particle-Laden Flows
title_full_unstemmed Numerical Investigation of the Characteristics of Erosion in a Centrifugal Pump for Transporting Dilute Particle-Laden Flows
title_sort numerical investigation of the characteristics of erosion in a centrifugal pump for transporting dilute particle-laden flows
publisher MDPI AG
series Journal of Marine Science and Engineering
issn 2077-1312
publishDate 2021-09-01
description Erosion in centrifugal pumps for transporting flows with dilute particles is a main pump failure problem in many engineering processes. A numerical model combining the computational fluid dynamics (CFD) and Discrete Element Method (DEM) is applied to simulate erosion in a centrifugal pump. Different models of the liquid-solid inter-phase forces are implemented, and the particle-turbulence interaction is also defined. The inertial particles considered in this work are monodisperse and have finite size. The numerical results are validated by comparing the results with a series of experimental data. Then, the effects of particle volume fraction, size, and shape on the pump erosion are estimated in the simulations. The results demonstrate that severe erosive areas are located near the inlet and outlet of the pressure side of the impeller blade, the middle region of the blade, the corners of the shroud and hub of the impeller adjoining to the pressure side of the blade, and the volute near the pump tongue. Among these locations, the maximum erosion occurs near the inlet of the pressure side of the blade. Erosion mitigation occurs under the situation where more particles accumulate in the near-wall region of the eroded surface, forming a buffering layer. The relationship between the particle size and the erosion is nonlinear, and the 1 mm particle causes the maximum pump erosion. The sharp particles cause more severe erosion in the pump because both the frequency of particle-wall collisions and the impact angle increase with the increasing sharpness of the particle.
topic erosion
centrifugal pump
dilute particle-laden flow
numerical simulation
CFD
DEM
url https://www.mdpi.com/2077-1312/9/9/961
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