Use of Surface Flow Visualization Methods in Centrifugal Pump Design

[+] Author and Article Information
Christopher P. Hamkins, Stephan Bross

KSB Aktiengesellschaft, Frankenthal, Germany

J. Fluids Eng 124(2), 314-318 (May 28, 2002) (5 pages) doi:10.1115/1.1470477 History: Received August 06, 2001; Revised December 17, 2001; Online May 28, 2002
Copyright © 2002 by ASME
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Flow pattern on the back casing wall opposite the impeller, overlaid with isobars
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Flow directions determined by imaging processing of Fig. 1
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Flow pattern on an impeller shroud for Re=1.66⋅106 with radial inflow QL=−0.00008
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Flow angles (individual points ±5 deg; curve fit ±0.5 deg) determined by image analysis of Fig. 3
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Flow angles (±0.5 deg) dependent on local Reynolds number
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Correlation of impeller radial force determined by integrating the measured pressures and by analyzing the flow pattern
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Comparison of experimental and numerical impeller oil flow pictures. (a) Experimental, 100% BEP, (b) computational, 100% BEP, (c) experimental 57% BEP, (d) computational 57% BEP.
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Flow patterns in a vaned diffuser. (a) Computational result with uniform inlet velocity profile boundary condition, (b) experimental oil flow pattern, (c) computational result with distorted inlet velocity profile boundary condition.




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