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The Influences of Gap Clearance and Surface Roughness on Leakage Loss and Disc Friction of Centrifugal Pumps

[+] Author Affiliations
Alberto Tamm, Bernd Stoffel

Darmstadt University of Technology, Darmstadt, Germany

Paper No. FEDSM2002-31324, pp. 267-274; 8 pages
doi:10.1115/FEDSM2002-31324
From:
  • ASME 2002 Joint U.S.-European Fluids Engineering Division Conference
  • Volume 1: Fora, Parts A and B
  • Montreal, Quebec, Canada, July 14–18, 2002
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 0-7918-3615-0 | eISBN: 0-7918-3600-2
  • Copyright © 2002 by ASME

abstract

Among the losses arising in low specific speed pumps, the disc friction and leakage losses are especially important. These losses arise due to the flow through unavoidable gaps and side spaces (SS) between impeller and casing. To predict these losses, normally simple correlations and empirical formulas are used. The following analysis was intended to study the effects of the radial clearance of the sealing gaps as well as of the surface roughness of the wetted surfaces within the SS, which may have an essential impact on the losses of centrifugal pumps.

Copyright © 2002 by ASME

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