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Technical Briefs

Numerical and Experimental Study of Axial Force and Hydraulic Performance in a Deep-Well Centrifugal Pump With Different Impeller Rear Shroud Radius

[+] Author and Article Information
Ling Zhou

National Research Center of Pumps &
Pumping System Engineering & Technology,
Jiangsu University,
Zhenjiang 212013, China;
Department of Mechanical Engineering &
Materials Science,
Washington University in St. Louis,
St. Louis, MO 63130
e-mail: lingzhoo@hotmail.com

Weidong Shi

e-mail: wdshi@ujs.edu.cn

Wei Li

National Research Center of Pumps &
Pumping System Engineering & Technology,
Jiangsu University,
Zhenjiang 212013, China

Ramesh Agarwal

Department of Mechanical Engineering &
Materials Science,
Washington University in St. Louis,
St. Louis, MO 63130

1Corresponding author.

Contributed by the Fluids Engineering Division of ASME for publication in the Journal of Fluids Engineering. Manuscript received February 14, 2013; final manuscript received June 24, 2013; published online July 23, 2013. Assoc. Editor: Frank C. Visser.

J. Fluids Eng 135(10), 104501 (Jul 23, 2013) (8 pages) Paper No: FE-13-1086; doi: 10.1115/1.4024894 History: Received February 14, 2013; Revised June 24, 2013

A multistage deep-well centrifugal pump (DCP) with different impeller rear shroud radius have been investigated both numerically and experimentally under multiconditons, which aims at studying the influence of impeller rear shroud radius to the axial force and pump hydraulic performance. During this study, a two-stage DCP equipped with three different impellers was simulated employing the commercial computational fluid dynamics (CFD) software ANYSY-Fluent to solve the Navier-Stokes equations for three-dimensional steady flow. High-quality structured grids were meshed on the whole computational domain. Test results were acquired by prototype experiments, and then compared with the predicted pump performance and axial force. The static pressure distribution in the pump passage obtained by numerical simulation was analyzed. The results indicated that the appropriate impeller rear shroud radius could improve the pump performance and lower the axial force significantly.

Copyright © 2013 by ASME
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Figures

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Fig. 1

Pressure distribution and axial forces on an impeller

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Fig. 2

Cross section of the investigated pump

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Fig. 3

Geometric model of the impeller with different R values

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Fig. 4

Impellers with different R values

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Fig. 5

Influence of impeller trimming on the outlet blade angle

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Fig. 6

Deep-well centrifugal pump experimental rig (no scale)

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Fig. 7

Axial force measurement instrument

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Fig. 8

Calculation domains

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Fig. 9

Sketch of the structured mesh (a) impeller (b) diffuser

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Fig. 10

Experimental results with different R values (a) head (b) efficiency (c) axial force (d) shaft power

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Fig. 11

Flow rate and pump efficiency of BEP with different R values

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Fig. 12

Comparison of the numerical and test results (a) R = 57.5 mm (b) R = 54.1 mm (c) R = 45.5 mm

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Fig. 13

Static pressure contours and velocity streamlines at the cross section under Qdes (a) R = 57.5 mm (b) R = 54.1 mm (c) R = 45.5 mm

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Fig. 14

Static pressure contours and velocity streamlines at the first stage impeller middle section under Qdes (a) R = 57.5 mm (b) R = 54.1 mm (c) R = 45.5 mm

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Fig. 15

Static pressure distribution comparison under Qdes

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