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TECHNICAL PAPERS

Effect of Relative Impeller-to-Volute Position on Hydraulic Efficiency and Static Radial Force Distribution in a Circular Volute Centrifugal Pump

[+] Author and Article Information
Daniel O. Baun

Department of Mechanical Aerospace and Nuclear Engineering, University of Virginia, Charlottesville, VA 22903-2442e-mail: dob2e@virginia.edu

Lutz Köstner

Salzgitter Pumpen AG, Salzgitter, Germany  

Ronald D. Flack

Department of Mechanical Aerospace and Nuclear Engineering, University of Virginia, Charlottesville, VA 22903-2442e-mail: rdf@virginia.edu

J. Fluids Eng 122(3), 598-605 (May 15, 2000) (8 pages) doi:10.1115/1.1287852 History: Received July 02, 1999; Revised May 15, 2000
Copyright © 2000 by ASME
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References

Binder,  R. C., and Knapp,  R. T., 1936, “Experimental Determination of the Flow Characteristics in the Volutes of Centrifugal Pumps,” Trans. ASME, 58, No. 8, p. 659.
Acosta,  A. J., and Bowerman,  R. D., 1957, “An Experimental Study of Centrifugal Pump Impellers,” Trans. ASME, 79, pp. 1821–1831.
Stepanoff, A. J., 1957, Centrifugal and Axial Flow Pumps, Wiley, NY.
Agostinelli,  A., Nobles,  D., and Mockridge,  C. R., 1960, “An Experimental Investigation of Radial Thrust in Centrifugal Pumps,” ASME J. Eng. Power, 80, pp. 120–126.
Biheller,  H. J., 1965, “Radial Forces on the Impeller of Centrifugal Pumps with Volute, Semivolute, and Fully Concentric Casings,” ASME J. Eng. Power, 85, pp. 319–323.
Hergt, P., and Krieger, P. 1972, “Radial Forces and Moments Acting on the Impeller of Volute Casing Pumps,” Proceedings of the Fourth Conference of Fluid Machinery, Budapest, pp. 599–619.
Kanki, H., Kawata, Y., and Kawatani, T., 1981, “Experimental Research on the Hydraulic Excitation Force on the Pump Shaft,” Proceedings, ASME Design Engineering Technical Conf., 81-DET-71, Sept., Hartford, CT.
Chamieh,  D. S., Acosta,  A. J., Brennen,  C. E., Caughey,  T. K., and Franz,  R., 1985, “Experimental Measurements of Hydrodynamic Radial Forces and Stiffness Matrices for a Centrifugal Pump Impeller,” ASME J. Fluids Eng., 107, pp. 307–315.
de Ojeda,  W., Flack,  R. D., and Miner,  S. M., 1995, “Laser Velocimetry Measurements in a Double Volute Centrifugal Pump,” Int. J. Rotat. Mach. ,1, Nos. 3–4, pp. 199–214.
Domm, U., and Hergt, P., 1970, “Radial Forces on Impeller of Volute Casing Pumps,” Flow Research on Blading, Elsevier, NY, pp. 305–321.
Lorett,  J. A., and Gopalakrishnan,  S., 1986, “Interaction Between Impeller and Volute of Pumps at Off-Design Conditions,” ASME J. Fluids Eng., 108, pp. 12–18.
Fongang,  R., Colding-Jorgenson,  J., and Nordman,  R., 1998, “Investigation of Hydrodynamic Forces on Rotating and Whirling Centrifugal Pump Impellers,” ASME J. Turbomach., 120, pp. 179–185.
Baun,  D. O., and Flack,  R. D., 1999, “A Plexiglas Research Pump with Calibrated Magnetic Bearing/Load Cells for Radial and Axial Hydraulic Force Measurements,” ASME J. Fluids Eng., 121, pp. 126–132.
Baun,  D. O., Fittro,  R. L., and Maslen,  E. H., 1997, “Force versus Current and Air Gap Calibration of a Double Acting Magnetic Thrust Bearing,” ASME J. Eng. Gas Turbines Power, 119, pp. 942–948.
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Figures

Grahic Jump Location
Nondimensional force contours (F) at the normalized flow coefficient, ϕ/ϕref=0.5 for the CV. (Uncertainties: ΔF≈±0.002;Δϕ/ϕref≈±0.01; Δξ≈±0.001; Δζ≈±0.001.)
Grahic Jump Location
Nondimensional force contours (F) at the normalized flow coefficient, ϕ/ϕref=0.75 for the CV. (Uncertainties: ΔF≈±0.002;Δϕ/ϕref≈±0.01; Δξ≈±0.001; Δζ≈±0.001.)
Grahic Jump Location
Nondimensional force contours (F) at the normalized flow coefficient, ϕ/ϕref=1.0 for the CV. (Uncertainties: ΔF≈±0.002;Δϕ/ϕref≈±0.01; Δξ≈±0.001; Δζ≈±0.001.)
Grahic Jump Location
Normalized efficiency contours (θf) at the normalized flow coefficient, ϕ/ϕref=1.0 for the CV. (Uncertainties: Δη/ηref≈±0.01;Δϕ/ϕref≈±0.01; Δξ≈±0.001; Δζ≈±0.001.)
Grahic Jump Location
Magnitude and orientation of resultant hydraulic force: centered SV, centered CV and optimally located CV (ε≈0.55, θe≈46  deg). (Uncertainties: Δϕ/ϕref≈±0.01;ΔF≈±0.002;Δθe≈±0.15 deg.)
Grahic Jump Location
Normalized volute area (AV) versus angular position in volute (θv)
Grahic Jump Location
Variation of normalized head coefficient and normalized efficiency with relative position along Y-axis for the CV. (Uncertainties: Δϕ/ϕref≈±0.01;Δψ/ψref≈±0.007;Δη/ηref≈±0.01.)
Grahic Jump Location
Matrix of test positions. (Uncertainties: Δε≈±0.003, Δθe≈±0.15 deg.)
Grahic Jump Location
Hydraulic performance: centered SV, centered CV and optimally located CV (ε≈0.55, θe≈46 deg). (Uncertainties: Δϕ/ϕref≈±0.01;Δψ/ψref≈±0.007;Δη/ηref≈±0.01.)
Grahic Jump Location
Circular volute (CV) with definition of impeller eccentricity
Grahic Jump Location
Variation of nondimensional resultant force (F) with relative position along Y-axis for the CV. (Uncertainties: Δϕ/ϕref≈±0.01;ΔF≈±0.002; Δε≈±0.003; Δθe≈±0.15 deg.)
Grahic Jump Location
Variation of resultant force vector orientation (θf) with relative position along Y-axis for the CV. (Uncertainties: Δϕ/ϕref≈±0.01;ΔF≈±0.002; Δε≈±0.003; Δθe≈±0.15 deg.)
Grahic Jump Location
Nondimensional force contours (F) at the normalized flow coefficient, ϕ/ϕref=0.0 for the CV. (Uncertainties: ΔF≈±0.002;Δϕ/ϕref≈±0.01; Δξ≈±0.001; Δζ≈±0.001.)

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