A Study on Cavitation Scale Effects Especially with Respect to Cavitation-Induced High-Pressure Pulses

Yukio Ito, Risaburo Oba, Hitoshi Soyama, Hiroyuki Ogata, Tomoyoshi Okamura, Sumio Sudo, Ryuji Ikeda

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

As a first step to clarifying the mechanism of scale effects on cavitation erosion, cavitation-induced shock pressure pulses were carefully investigated around four similar flat hydrofoils, from 53 mm to 160 mm in a chord length C, under a so-called “true similar conditions” of the same flow velocity, incidence and cavitation number as well as almost the same nuclei distribution in the test water, within the subcavitation region. Under these similar conditions, no marked scale effects on the mean pressure are recognized. When C is large, very large U-shaped vortex cavitation bubbles grow and predominantly collapse, resulting in very high locally concentrated pressure pulses on the foil surface. On the other hand, a large number of moderate pressure pulses attack the surface in a smaller C.

Original languageEnglish
Pages (from-to)2727-2733
Number of pages7
JournalTransactions of the Japan Society of Mechanical Engineers Series B
Volume54
Issue number506
DOIs
Publication statusPublished - 1988

Keywords

  • Cavitation
  • Erosion
  • Hydrofoil
  • Pressure Sensitive Film
  • Scale Effect
  • Shock Pressure Pulse
  • Vibrational Acceleration
  • Vortex Cavitation

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering

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