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TECHNICAL PAPERS

Flow in a Centrifugal Pump Impeller at Design and Off-Design Conditions—Part I: Particle Image Velocimetry (PIV) and Laser Doppler Velocimetry (LDV) Measurements

[+] Author and Article Information
Nicholas Pedersen, Poul S. Larsen

Department of Mechanical Engineering, Fluid Mechanics Section, Technical University of Denmark, DK-2800 Lyngby, Denmark

Christian B. Jacobsen

Fluid Dynamic Engineering, Grundfos Management A/S, DK-8850 Bjerringbro, Denmark

J. Fluids Eng 125(1), 61-72 (Jan 22, 2003) (12 pages) doi:10.1115/1.1524585 History: Received September 20, 2001; Revised May 06, 2002; Online January 22, 2003
Copyright © 2003 by ASME
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References

Wernet,  M. P., 2000, “Development of Digital Particle Imaging Velocimetry for Use in Turbomachinery,” Exp. Fluids, 28, pp. 97–115.
Paone, N., Riethmuller, M. L., and Van den Braembussche, R., 1988, “Application of Particle Image Displacement Velocimetry to a Centrifugal Pump,” Proceedings of the 4th Intl. Symp. on Appl. of Laser Techniques to Fluid Mechanics, Lisbon, Portugal, p. 6.
Akin,  O., and Rockwell,  D., 1994, “Flow Structure in a Radial Flow Pumping System Using High-Image-Density Particle Image Velocimetry,” ASME J. Fluids Eng., 116, pp. 538–544.
Eisele,  K., Zhang,  Z., and Casey,  M. V., 1997, “Flow Analysis in a Pump Diffuser—Part 1: LDA and PTV Measurements of the Unsteady Flow,” ASME J. Turbomach., 119, pp. 968–977.
Sinha,  M., and Katz,  J., 2000, “Quantitative Visualization of the Flow in a Centrifugal Pump With Diffuser Vanes—I: On Flow Structures and Turbulence,” ASME J. Fluids Eng., 122, pp. 97–107.
Sinha,  M., Katz,  J., and Meneveau,  C., 2000, “Quantitative Visualization of the Flow in a Centrifugal Pump With Diffuser Vanes—II: Addressing Passage-Averaged and Large-Eddy Simulation Modeling Issues in Turbomachinery Flows,” ASME J. Fluids Eng., 122, pp. 108–116.
Oldenburg, M., and Pap, E., 1996, “Velocity Measurements in the Impeller and in the Volute of a Centrifugal Pump by Particle Image Displacement Velocimetry,” Proceedings of the 8th International Symposium on Applications of Laser Techniques to Fluid Mechanics, Lisbon, Portugal, pp. 8.2.1–8.2.5.
Hayami, H., Aramaki, S., and Watanabe, Y., 1997, “PC-PIV System for a Measurement of Relative Flow in a Rotating Impeller Impeller,” The Second International Workshop on PIV’97-Fukui, Fukui, Japan, July, The Visualization Society of Japan, pp. 105–108.
Aramaki, S., and Hayami, H., 1999, “Unsteady Flow Measurement in a Rotating Impeller Using PIV,” Proceedings of the 3rd International Workshop on PIV, Sep. 16–18, Santa Barbara, CA.
Pedersen, N., and Jacobsen, C. B., 2000, “PIV Investigation of the Internal Flow Structure in a Centrifugal Pump Impeller,” Proceedings of the 10th Intl. Symp. on Appl. Laser Techniques to Fluid Mechanics, Lisbon, Portugal, July, pp. 28.3.1–28.3.10.
Pedersen, N., 2000, “Experimental Investigation of Flow Structures in a Centrifugal Pump Impeller Using Particle Image Velocimetry,” Ph.D. thesis, Department of Mechanical Engineering, Fluid Mechanics Section, Technical University of Denmark, Copenhagen, Denmark.
Byskov,  R. K., Jacobsen,  C. B., and Pedersen,  N., 2003, “Flow in a Centrifugal Pump Impeller at Design and Off-Design Conditions—Part II: Large Eddy Simulations,” ASME J. Fluids Eng., 125, pp. 73–83.
Grundfos A/S, WinCAPS Catalogue, 1997, Ver 7.0. Product No: 41260001 CR4-20/1.
Westerweel, J., 1998, “Effect of Sensor Geometry on the Performance of PIV Interrogation,” Proceedings of the 9th Intl. Symp. on Appl. of Laser Techniques to Fluid Mechanics, Lisbon, Portugal, pp. 1.2.1–1.2.8.
Keane,  R. D., and Adrian,  R. J., 1990, “Optimization of Particle Image Velocimeters. Part I: Double Pulsed Systems,” Meas. Sci. Technol., 1, pp. 1202–1215.
Scarano,  F., and Riethmuller,  M. L., 1999, “Iterative Multigrid Approach in PIV Image Processing With Discrete Window Offset,” Exp. Fluids, 26, pp. 513–523.
Raffel, M., Willert, C., and Kompenhans, J., 1998, Particle Image Velocimetry—A Practical Guide, Springer-Verlag, New York.
Ullum, U., 1999, “Imaging Techniques for Planar Velocity and Concentration Measurements,” Ph.D. thesis, Department of Mechanical Engineering, Fluid Mechanics Section, Technical University of Denmark, Copenhagen, Denmark.
Agüı́,  J. C., and Jiménez,  J., 1987, “On the Performance of Particle Tracking,” J. Fluid Mech., 185, pp. 447–468.
Westerweel,  J., 1997, “Fundamentals of Digital Particle Image Velocimetry,” Meas. Sci. Technol., 8, pp. 1379–1392.
Ullum,  U., Schmidt,  J. J., Larsen,  P. S., and McCluskey,  D. R., 1998, “Statistical Analysis and Accuracy of PIV Data,” J. Visual., 1 (2), pp. 205–216.
Stepanoff, A. J., 1957, Centrifugal and Axial Flow Pumps, 2nd Ed., John Wiley and Sons, New York.
Abramian,  M., and Howard,  J. H. G., 1994, “Experimental Investigation of the Steady and Unsteady Relative Flow in a Model Centrifugal Impeller Passage,” ASME J. Turbomach., 116, pp. 269–279.
Ubaldi,  M., Zunino,  P., and Ghiglione,  A., 1998, “Detailed Flow Measurements Within the Impeller and the Vaneless Diffuser of a Centrifugal Turbomachine,” Exp. Therm. Fluid Sci., 17, pp. 147–155.
Visser,  F. C., Brouwers,  J. J. H., and Jonker,  J. B., 1999, “Fluid Flow in a Rotating Low-Specific-Speed Centrifugal Impeller Passage,” Fluid Dyn. Res., 24, pp. 275–292.
Farge,  T. Z., and Johnson,  M. W., 1992, “Effect of Flow Rate on Loss Mechanisms in a Backswept Centrifugal Impeller,” Int. J. Heat Fluid Flow, 13(2), pp. 189–196.
Lennemann,  E., and Howard,  J. H. G., 1970, “Unsteady Flow Phenomena in Centrifugal Impeller Passages,” J. Eng. Power, 92(1), pp. 65–72.
Yoshida, Y., Murakami, Y., Tsurusaki, T., and Tsujimoto, Y., 1991, “Rotating Stalls in Centrifugal Impeller/Vaned Diffuser Systems,” Proc First ASME/JSME Joint Fluids Eng. Conf., ASME, New York, pp. 125–130.
Hesse,  N. H., and Howard,  J. H. G., 1999, “Experimental Investigation of Blade Loading Effects at Design Flow in Rotating Passages of Centrifugal Impellers,” ASME J. Appl. Mech., 121, pp. 813–823.

Figures

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Two stages of an industrial multistage pump with the shrouded centrifugal pump impeller under study, 13
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Blade-to-blade (left) and meridional (right) view of the shrouded centrifugal pump impeller, 13
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Measured performance curve for a single stage of the multistage pump under investigation, 13. The design load condition is marked by a star and the quarter-load condition by a circle.
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Closed-loop test rig consisting of a 400-mm diameter cylindrical tank with the 190-mm diameter test impeller mounted in the vertical center plane. Optical access was provided from the sides as well as from beneath, 11.
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Schematic of the PIV setup
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Measurement positions. The squares show the locations of the two 93×94 mm2 field-of-views measured with PIV, and the circles indicate the LDV measurement radii.
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Sample instantaneous velocity vector maps; (a) absolute velocity C, (b) corresponding relative velocity vector map W . (Q/Qd=1.0).
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Ensemble averaged relative speed |〈W 〉|. A copy of the measured data has been rotated 60 deg with respect to the rotation axis to demonstrate the flow congruence between adjacent passages. (Q/Qd=1.0).
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Vector plot of the relative velocity 〈W 〉 measured with LDV at radial stations of r/R2={0.65,0.75,0.90,1.01}.(Q/Qd=1.0).
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(a) Contour plot of the portion k2D of the turbulent kinetic energy, measured by PIV. (b) Convergence history of the first and second moments in the three sample grid points P1,P2, and P3. (b1) Horizontal velocity component 〈Cx〉. (b2) Turbulent kinetic energy k2D.(Q/Qd=1.0).
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PIV vector maps of the relative velocity W . (a) Sample instantaneous snapshot. (b) Ensemble average of 1000 instantaneous samples. (c) Sample instantaneous deviation. (Q/Qd=0.25).
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Details of the ensemble averaged relative PIV velocity field 〈W 〉 shown in Fig. 11(b). (a) Inlet stall cell. (b) Reversed flow at outlet. (Q/Qd=0.25).
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Vector maps of the ensemble averaged relative velocity 〈W 〉. The well-behaved passage is denoted A and the stalled passage is denoted B. Only every second vector is shown to avoid crowding. (Q/Qd=0.25).
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Vector plot of the relative velocity 〈W 〉 measured with LDV at radial stations of r/R2={0.50,0.65,0.75,0.90}.(Q/Qd=0.25).
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Contour plot of the measured portion k2D of the turbulent kinetic energy. (Q/Qd=0.25).
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Bin resolved LDV data obtained at r/R2=0.90. (a) Radial velocity 〈Cr〉. (b) Tangential velocity 〈Ct〉. (c) RMS-velocity Cr. (d) Number of radial velocity samples. (Q/Qd=1.0).
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Bin resolved LDV data obtained at r/R2=0.90. (a) Radial velocity 〈Cr〉. (b) Tangential velocity 〈Ct〉. (c) RMS-velocity Cr. (d) Number of radial velocity samples. (Q/Qd=0.25).
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Blade-to-blade distributions of the mean radial velocity 〈Cr〉/U2 measured with PIV (— —) and LDV (–) at flow rates of Qd (left) and 0.25Qd (right). (a) r/R2=0.50, (b) r/R2=0.75, (c) r/R2=0.98.
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Blade-to-blade distributions of the mean tangential velocity 〈Wt〉/U2 measured with PIV (— —) and LDV (–) at flow rates of Qd (left) and 0.25Qd (right). (a) r/R2=0.50, (b) r/R2=0.75, (c) r/R2=0.98.
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Blade-to-blade distributions of the turbulence intensity Tu=k2D/U2 measured with PIV (— —) and LDV (–) at flow rates of Qd (left) and 0.25Qd (right). (a) r/R2=0.65, (b) r/R2=0.90, (c) r/R2=0.98.

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