Comparison of Periodic Flow Fields in a Radial Pump among CFD, PIV, and LDV Results

Feng, Jianjun; Benra, Friedrich-Karl; Dohmen, Hans Josef

doi:10.1155/2009/410838

Cited by 19 publications

(13 citation statements)

References 21 publications

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“…Many researchers have used this CFD code for numerical computation. The numerical results of Feng et al [32,33] compared well with the PIV and LDV experiment results both qualitatively and quantitatively at different operating points.…”

Section: Numerical Modelmentioning

confidence: 62%

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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Section: Numerical Modelmentioning

confidence: 62%

Unsteady Analysis of Impeller-Volute Interaction in Centrifugal Pump

Cheah¹,

Lee²,

Winoto³

2011

International Journal of Fluid Machinery and Systems

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“…The numerical and test results of the pressure fluctuation at impeller exit are globally satisfactory. Feng et al [14,15] compared the CFD results well with the PIV and LDV results qualitatively and quantitatively at different operating points. Hence with the above validations of the commercial CFD code by other researchers, it could relatively assure that the CFD code can give a reasonable accuracy compare with the experimental results.…”

Section: Numerical Modelmentioning

confidence: 99%

Numerical Study of Inlet and Impeller Flow Structures in Centrifugal Pump at Design and Off-design Points

Cheah

Lee

S.H

2011

International Journal of Fluid Machinery and Systems

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The objective of present work is to use numerical simulation to investigate the complex three-dimensional and secondary flow structures developed at the inlet and impeller in a centrifugal pump at design and off-design points. The pump impeller is shrouded with 6 backward swept blades and with a specific speed of 0.8574. The characteristic of the pump is measured experimentally with straight and curved intake sections. Numerical computation is carried out to investigate the pump inlet flow structures and subsequently the flow field within the centrifugal pump. The numerical results showed that strong interaction between the impeller eye and intake section. Secondary flow structure occurs upstream at the pump inlet has great influence on the pump performance and flow structure within the impeller.

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“…Benra et al [8] calculated the transient flow in an industrial radial pump stage with all the blades by CFX for design operating point. Experimental work was carried out by Feng et al [9] to investigate the unsteady flow in a low specific speed radial diffuser pump using LDV and PIV techniques. The phase-averaged velocity field, turbulence field and the blade orientation effects were quantitatively examined in detail.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Periodically Unsteady Pressure Field in a High Power Centrifugal Diffuser Pump

Pei

Wang

Yuan

et al. 2014

Advances in Mechanical Engineering

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Pressure fluctuations are the main factors that can give rise to reliability problems in centrifugal pumps. The periodically unsteady pressure characteristics caused by rotor-stator interaction have been investigated by CFD calculation in a residual heat removal pump. Side chamber flow effect is also considered for the simulation to accurately predict the flow in whole flow passage. The pressure fluctuation results in time and frequency domains were considered for several typical monitoring points in impeller and diffuser channels. In addition, the pressure fluctuation intensity coefficient (PFIC) based on standard deviation was defined on each grid node for entire space and impeller revolution period. The results show that strong pressure fluctuation intensity can be found in the gap between impeller and diffuser. As a source, the fluctuation can spread to the upstream and downstream flow channels as well as the side chamber channels. Meanwhile, strong pressure fluctuation intensity can be found in the discharge tube of the circular casing. In addition, the obvious influence of operational flow rate on the PFIC distribution can be found. The analysis indicates that the pressure fluctuations in the aspects of both frequency and intensity can be used to comprehensively evaluate the unsteady pressure characteristics in centrifugal pumps.

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Comparison of Periodic Flow Fields in a Radial Pump among CFD, PIV, and LDV Results

Cited by 19 publications

References 21 publications

Unsteady Analysis of Impeller-Volute Interaction in Centrifugal Pump

Unsteady Analysis of Impeller-Volute Interaction in Centrifugal Pump

Numerical Study of Inlet and Impeller Flow Structures in Centrifugal Pump at Design and Off-design Points

Numerical Investigation of Periodically Unsteady Pressure Field in a High Power Centrifugal Diffuser Pump

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