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Experimental Investigations Concerning Erosive Aggressiveness of Cavitation at Different Test Configurations

[+] Author Affiliations
B. Bachert

Heidelberg Institute of Research and Development, Heidelberg, Germany

M. Dular, G. Ludwig, B. Stoffel

Darmstadt University of Technology, Darmstadt, Germany

S. Baumgarten

KSB AG

Paper No. HT-FED2004-56597, pp. 733-743; 11 pages
doi:10.1115/HT-FED2004-56597
From:
  • ASME 2004 Heat Transfer/Fluids Engineering Summer Conference
  • Volume 3
  • Charlotte, North Carolina, USA, July 11–15, 2004
  • Conference Sponsors: Heat Transfer Division and Fluids Engineering Division
  • ISBN: 0-7918-4692-X | eISBN: 0-7918-3740-8
  • Copyright © 2004 by ASME

abstract

The experimental results, which will be presented in this paper, demonstrate the significant influence of the flow velocity, respectively the rotational speed, on the erosive aggressiveness of cavitating flows. On two of the three investigated test objects, cavitation erosion can only be observed in the initial stage by the so-called pit-count evaluation method. Developed erosion with mass loss is impossible to measure because of the very long duration until mass loss appears. The third test rig generates a very aggressive type of cavitation, so that mass loss, depending on the tested material, will appear after relatively short durations. In addition, the initial stage of cavitation erosion can be observed. Three different techniques were applied to investigate cavitation erosion in the initial and developed stage. Thereby, the capability of methods to quantify erosive effects in dependence of influencing operating parameters has been proven.

Copyright © 2004 by ASME
Topics: Cavitation

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