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TECHNICAL PAPERS

Rotating Cavitation in a Centrifugal Pump Impeller of Low Specific Speed

[+] Author and Article Information
Jens Friedrichs, Günter Kosyna

Pfleiderer-Institut für Strömungsmaschinen, TU Braunschweig, Braunschweig, Germany

J. Fluids Eng 124(2), 356-362 (May 28, 2002) (7 pages) doi:10.1115/1.1457451 History: Received August 02, 2001; Revised October 17, 2001; Online May 28, 2002
Copyright © 2002 by ASME
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References

Spohnholtz, H. H., 1997, “NPSH-Verhalten von Halbaxial pumpen,” Diss. TU Braunschweig, publ. in Mitteilungen des Pfleiderer-Instituts für Strömungsmaschinen, Heft 4, W. H. Faragallah.
Dreiß, A., 1997, “Untersuchung der Laufradkavitation einer radialen Kreiselpumpe durch instationäre Druckmessungen im rotierenden System,” Diss. TU Braunschweig, publ. in Mitteilungen des Pfleiderer-Instituts für Strömungs maschinen, Heft 4, W. H. Faragallah.
Dreiß, A., and Kosyna, G., 1997, “Experimental Investigations of Cavitation-States in a Radial Pump Impeller,” Proceedings of the JSME Centennial Grand Congress, International Conference on Fluid Engineering.
Tsujimoto,  Y., Yoshida,  Y., Maekawa,  Y., Watanabe,  S., and Hashimoto,  T., 1997, “Observations of Oscillating Cavitation of an Inducer,” ASME J. Fluids Eng., 119, pp. 775–781.
Tsujimoto,  Y., Kamijo,  K., and Yoshida,  Y., 1993, “A Theoretical Analysis of Rotating Cavitation in Inducers,” ASME J. Fluids Eng., 115, pp. 135–141.
Greitzer,  E. M., 1981, “The Stability of Pumping Systems,” ASME J. Fluids Eng., 103, pp. 193–242.
Watanabe,  S., Sato,  K., Tsujimoto,  Y., and Kamijo,  K., 1999, “Analysis of Rotating Cavitation in a Finite Pitch Cascade Using a Closed Cavity Model and a Singularity Method,” ASME J. Fluids Eng., 121, pp. 834–840.
Huang,  J.-D., Aoki,  M., and Zhang,  J.-T., 1998, “Alternate Blade Cavitation on Inducer,” JSME International Journal, Series B, 41, pp. 1–6.
Horiguchi,  H., Watanabe,  S., Tsujimoto,  Y., and Aoki,  M., 2000, “A Theoretical Analysis of Alternate Blade Cavitation in Inducers,” ASME J. Fluids Eng., 122, pp. 156–163.

Figures

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Cross-sectional view of the test pump
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Plane view of impeller 2
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Impeller 2 characteristic and incipient cavitation
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Head-drop-curves of impeller 2
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Snapshot of rotating cavitation at 45 percent part load (φ=0.0136)
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Quasi-steady state at 45 percent part load
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Snapshots of rotating cavitation at 45 percent part load (φ=0.0136), fiber-probe fitted blade
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Quasi-steady state at 45 percent part load
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Sketches of rotating cavitation from high-speed film, φ=0.0165
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FFT of pressure signals: Blade suction side (top) and impeller hub (bottom), quasi-steady cavitation (left) and within rotating cavitation (right) at 45 percent part load, (φ=0.0136)

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