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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

Figures

Grahic Jump Location
Circular volute (CV) with definition of impeller eccentricity
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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.)
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Matrix of test positions. (Uncertainties: Δε≈±0.003, Δθe≈±0.15 deg.)
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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.)
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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.)
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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.)
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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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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.)
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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.)
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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.)
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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.)
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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.)
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Normalized volute area (AV) versus angular position in volute (θv)

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