Numerical Flow Simulation and Cavitation Prediction in a Centrifugal Pump using an SST-SAS Turbulence Model

The paper handles the subject of the modelling and simulation of the flow inside a centrifugal pump through non-cavitating and cavitating conditions. Operating under cavitation state is so perilous to a pump and can considerably reduce its lifetime service. Hence, to provide highly reliable pumps, i...

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Vydané v:Journal of Applied Fluid Mechanics Ročník 12; číslo 1; s. 25 - 39
Hlavní autori: Ennouri, M., Kanfoudi, H., Bel Hadj Taher, A., Zgolli, R.
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: Isfahan Isfahan University of Technology 01.01.2019
Predmet:
Cavitation
Centrifugal pumps
Computational fluid dynamics
Flow simulation
Fluid flow
High Reynolds number
Impact analysis
Impellers
Internal flow
Mathematical models
Numerical analysis
Numerical models
Pumps
Simulation
Temporal distribution
Three dimensional flow
Turbulence
Turbulence effects
Turbulence models
Unsteady simulation; Scale-adaptive simulation; NACA66; Centrifugal pump; Cavitation
ISSN:1735-3572, 1735-3645
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Abstract The paper handles the subject of the modelling and simulation of the flow inside a centrifugal pump through non-cavitating and cavitating conditions. Operating under cavitation state is so perilous to a pump and can considerably reduce its lifetime service. Hence, to provide highly reliable pumps, it is essential to comprehend the inner flow of pumps. The investigated centrifugal pump comprises five backward curved-bladed impeller running at 900 rpm. The modelling process started with an unsteady numerical analysis under non-cavitating conditions to validate the numerical model and the solver comparing with the available testing data. Due to high Reynolds numbers, turbulence effects have been taken into account by unsteady RANS methods using an SST-SAS turbulence model. The obtained pump performances were numerically compared with the experimental ones, and the outcome shows an acceptable agreement between both. The temporal distribution of the internal flow parameters such as pressure and velocity was then studied. Furthermore, basic investigations of cavitating flow around 3D NACA66-MOD profile using a recently developed and validate cavitation model was established. The verification of the numerical simulation validity was based on comparing calculated and experimental results and presented good agreement. Finally, a 3D simulation of the inception of the cavitating pocket inside the centrifugal pump is performed to analyze the impact of the cavitation in the decrease of the head and efficiency.
AbstractList The paper handles the subject of the modelling and simulation of the flow inside a centrifugal pump through non-cavitating and cavitating conditions. Operating under cavitation state is so perilous to a pump and can considerably reduce its lifetime service. Hence, to provide highly reliable pumps, it is essential to comprehend the inner flow of pumps. The investigated centrifugal pump comprises five backward curved-bladed impeller running at 900 rpm. The modelling process started with an unsteady numerical analysis under non-cavitating conditions to validate the numerical model and the solver comparing with the available testing data. Due to high Reynolds numbers, turbulence effects have been taken into account by unsteady RANS methods using an SST-SAS turbulence model. The obtained pump performances were numerically compared with the experimental ones, and the outcome shows an acceptable agreement between both. The temporal distribution of the internal flow parameters such as pressure and velocity was then studied. Furthermore, basic investigations of cavitating flow around 3D NACA66-MOD profile using a recently developed and validate cavitation model was established. The verification of the numerical simulation validity was based on comparing calculated and experimental results and presented good agreement. Finally, a 3D simulation of the inception of the cavitating pocket inside the centrifugal pump is performed to analyze the impact of the cavitation in the decrease of the head and efficiency.
Author Kanfoudi, H.
Zgolli, R.
Bel Hadj Taher, A.
Ennouri, M.
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ContentType Journal Article
Copyright 2019. This work is published under http://creativecommons.org/licenses/by-nc-nd/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.
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CorporateAuthor Laboratory of Hydraulic and Environmental Modeling, National Engineering School of Tunis, University of Tunis EL MANAR, 1002 Tunis, Tunisia
Laboratory of Hydraulic and Environment Modeling, National Engineering School of Tunis, University of Tunis El Manar, Tunis, 1002, Tunisia
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Snippet The paper handles the subject of the modelling and simulation of the flow inside a centrifugal pump through non-cavitating and cavitating conditions. Operating...
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StartPage 25
SubjectTerms Cavitation
Centrifugal pumps
Computational fluid dynamics
Flow simulation
Fluid flow
High Reynolds number
Impact analysis
Impellers
Internal flow
Mathematical models
Numerical analysis
Numerical models
Pumps
Simulation
Temporal distribution
Three dimensional flow
Turbulence
Turbulence effects
Turbulence models
Unsteady simulation; Scale-adaptive simulation; NACA66; Centrifugal pump; Cavitation
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