Marked Effects of Ambient Pressure on Impinging Erosion Induced by High-Speed Submerged Water Jets

Yoshiaki Yamauchi, Kengo Asami, Hitoshi Soyama, Kazunori Sato, Toshiaki Ikohagi, Risaburo Oba

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

In order to extend the working range of high-speed submerged water jets and to improve its accuracy confidence, the jet working characteristics are studied under the condition of widely varying ambient pressures P2. The erosion tests were systematically carried out by using aluminum-alloy specimens, and the aspects of the cavitation clouds around the jets were simultaneously observed. Clearly, the pressure P2 drastically affects the aspects of cavitation and its occurrence region. With increasing P2, the length of the cavitating jet decreases, so that the standoff distance, where the most severe erosion appears, shifs upstream. In short, the intensity and the distribution of the impulsive pressures induced by the cavitating jets also drastically change with P2. The impinging erosion characteristics are also sensitive to the standoff distance and the injection time.

Original languageEnglish
Pages (from-to)785-792
Number of pages8
JournalTransactions of the Japan Society of Mechanical Engineers Series B
Volume61
Issue number583
DOIs
Publication statusPublished - 1995

Keywords

  • Ambient Pressure
  • Cavitation
  • Cavitation Nuclei
  • Erosion
  • Jet
  • Standoff Distance

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering

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