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TECHNICAL PAPERS

Quantitative Visualization of the Flow in a Centrifugal Pump With Diffuser Vanes—I: On Flow Structures and Turbulence

[+] Author and Article Information
Manish Sinha, Joseph Katz

Department of Mechanical Engineering, The Johns Hopkins University, Baltimore, MD 21218

J. Fluids Eng 122(1), 97-107 (Nov 04, 1999) (11 pages) doi:10.1115/1.483231 History: Received January 08, 1999; Revised November 04, 1999
Copyright © 2000 by ASME
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References

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Arndt,  N., Acosta,  A. J., Brennen,  C. E., and Caughey,  T., 1989, “Rotor-Stator Interaction in a Diffuser Pump,” ASME J. Turbomach., 111, pp. 213–221.
Arndt,  N., Acosta,  A. J., Brennen,  C. E., and Caughey,  T., 1990, “Experimental investigation of Rotor-Stator Interaction in a Centrifugal Pump with Several Vaned Diffusers,” ASME J. Turbomach., 112, pp. 98–108.
Iino,  T., and Kasai,  K., 1985, “An Analysis of Unsteady Flow Induced by Interaction Between a Centrifugal Impeller and a Vaned Diffuser (in Japanese),” Trans. JSME, 51, pp. 154–159.
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Dong,  R., Chu,  S., and Katz,  J., 1992, “Quantitative Visualization of the Flow Structure Within the Volute of a Centrifugal Pump, Part B: Results and Analysis,” ASME J. Fluids Eng., 114, pp. 396–403.
Chu,  S., Dong,  R., and Katz,  J., 1995, “Relationship Between Unsteady Flow, Pressure Fluctuations and Noise in a Centrifugal Pump, Part A: Use of PIV Data to Compute the Pressure Field,” ASME J. Fluids Eng., 117, pp. 24–29.
Chu,  S., Dong,  R., and Katz,  J., 1995, “Relationship Between Unsteady Flow, Pressure Fluctuations and Noise in a Centrifugal Pump, Part B: Effect of Blade-Tongue Interaction,” ASME J. Fluids Eng., 117, pp. 30.
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Figures

Grahic Jump Location
Schematic of the pump and location of the present measurements (not to scale)
Grahic Jump Location
The optical and control system for image acquisition
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The performance curve of the pump. The experiments have been performed at 5.7 1/s (flow coefficient=0.118).
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(a) A sample phase-averaged vector map of the velocity distribution at θb=226 deg. (b) Magnitude of the phase averaged velocity distribution at impeller phase of (b1) θb=206 deg, (b2) θb=216 deg, (b3) θb=226 deg, (b4) θb=236 deg, and (b5) θb=246 deg
Grahic Jump Location
(a) Passage averaged velocity in the stator reference frame. Contours represent magnitude. (b) Distribution of Δu the cyclic velocity calculated as per Eq. (2) at (b1) 206 deg, (b2) 216 deg, (b3) 226 deg, (b4) 236 deg, and (b5) 246 deg
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Distribution of the turbulent kinetic energy (k*) at (a) θb=206 deg, (b) θb=216 deg, (c) θb=226 deg, (d) θb=236 deg, and (e) θb=246 deg, (f ) convergence of k* at selected points
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Distribution of the Reynolds Stress (−u1u2) at (a) θb=206 deg, (b) θb=216 deg, (c) θb=226 deg, (d) θb=236 deg, and (e) θb=246 deg, (f ) convergence of Reynolds stress (−u1u2) at selected points
Grahic Jump Location
Phase-averaged vorticity distributions at impeller phase: (a) 206 deg (direction of positive vorticity is out of the plane of the paper) (b) 216 deg, (c) 226 deg, (d) 236 deg, and (e) 246 deg.

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