Numerical Calculation of 2d, Unsteady Flow in Centrifugal Pumps: Impeller and Volute Interaction

Croba, Dimitra; Kueny, Jean-Louis

doi:10.1002/(sici)1097-0363(19960330)22:6<467::aid-fld324>3.0.co;2-o

Cited by 49 publications

(20 citation statements)

References 12 publications

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“…Usually these studies emphasized the prediction of the amplitude of the pressure fluctuations, at first for operation at the nominal flow rate and afterwards for wider ranges of the operating point. The flow models used range from 2D unsteady flow [11] and 3D quasi-unsteady flow [12] to fully 3D unsteady flow [13][14][15][16], with different choices of turbulence models and boundary conditions. The latter is in fact one of the most important issues in the simulation of impeller-volute interaction, because the boundary conditions should be compatible with the dynamic properties of the pumping circuit [6,17].…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of the unsteady flow in the near-tongue region in a volute-type centrifugal pump for different operating points

2010

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Section: Introductionmentioning

confidence: 99%

Numerical analysis of the unsteady flow in the near-tongue region in a volute-type centrifugal pump for different operating points

2010

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“…There are several numerical studies on the use of numerical method to predict the complex impeller and volute interaction based on two dimension models such as the one by Croba and Kueny [23] and Morfiadakis et al [24]. For three dimensional problem, Zhang et al [25,26], by solving the Navies-Stokes equations coupled with the standard two-equation k-ε turbulence model and their results compared well with those experimental study.…”

Section: Introductionmentioning

confidence: 99%

Unsteady Analysis of Impeller-Volute Interaction in Centrifugal Pump

Cheah¹,

Lee²,

Winoto³

2011

International Journal of Fluid Machinery and Systems

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An unsteady numerical analysis has been carried out to study the strong impeller volute interaction of a centrifugal pump with six backward swept blades shrouded impeller. The numerical analysis is done by solving the threedimensional Reynolds Averaged Navier-Stokes codes with standard k-ε two-equations turbulence model and wall regions are modeled with a scalable log-law wall function. The flow within the impeller passage is very smooth and following the curvature of the blade in stream-wise direction. However, the analysis shows that there is a recirculation zone near the leading edge even at design point. When the flow is discharged into volute casing circumferentially from the impeller outlet, the high velocity flow is severely distorted and formed a spiraling vortex flow within the volute casing. A spatial and temporal wake flow core development is captured dynamically and shows how the wake core diffuses. Near volute tongue region, the impeller/volute tongue strong interaction is observed based on the periodically fluctuating pressure at outlet. The results of existing analysis also proved that the pressure fluctuation periodically is due to the position of impeller blade relative to tongue.

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“…Starting from the works of (Croba and Kueny 1996;Kitano and H.E 2000;Bakir et al 2001;Parrondogayo, Gonzalez-Perez, and Fernandez-Francos 2002) up to today , many studies have been done on the impeller-volute interaction and pressure fluctuation characteristics by numerical or experimental methods which offer a valuable references (Akhras et al 2004;Asuaje et al 2005;Majidi 2005;González and Santolaria 2006;Cheah, Lee, and Winoto 2008;Feng, Benra, and Dohmen 2009;Barrio, Parrondo, and Blanco 2010;Li et al 2013;Longatte and Kueny 1999;Shuai et al 2015;Al-Qutub, Khalifa, and Khulief 2009;Pavesi, Cavazzini, and Ardizzon 2008;Zhang et al 2015).…”

Section: Introductionmentioning

confidence: 99%

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

Ennouri

Kanfoudi

Taher

et al. 2019

JAFM

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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.

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Numerical Calculation of 2d, Unsteady Flow in Centrifugal Pumps: Impeller and Volute Interaction

Cited by 49 publications

References 12 publications

Numerical analysis of the unsteady flow in the near-tongue region in a volute-type centrifugal pump for different operating points

Numerical analysis of the unsteady flow in the near-tongue region in a volute-type centrifugal pump for different operating points

Unsteady Analysis of Impeller-Volute Interaction in Centrifugal Pump

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

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