High-speed observations of severe cavitation erosion in a high-specific-speed centrifugal pump

Hitoshi Soyama, Shou Ren Li, Masashi Tonosaki, Kazuo Uranishi, Hiroharu Kato, Risaburo Oba

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

In order to clarify severe pump erosion practically, cavitation aspects are precisely measured at a specific speed Ns=300 (m, m3/min, rpm) under various test conditions, especially at low flow rates, through a clear-lucite front shroud of the test impeller and the lucite casing, by means of instantaneous photography and a high-speed video camera, the maximum framing rate of which is 40500 frames per second. Erosion tests are also carried out using three-dimensional impellers made of aluminum alloy. Severe erosion takes place on several parts of the test impeller, i.e., on the main shroud and on the suction side. At a low flow rate, severe erosion occurs on the pressure side near the leading edge. This results from a vortex cavitation arising in the reverse flow region near the pump inlet.

Original languageEnglish
Pages (from-to)3945-3951
Number of pages7
JournalTransactions of the Japan Society of Mechanical Engineers Series B
Volume61
Issue number591
DOIs
Publication statusPublished - 1995
Externally publishedYes

Keywords

  • Cavitation
  • Eroded Surface
  • Erosion
  • Leading Edge
  • Pump

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering

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