Cavitation of Surface Roughnesses (Kavitatsiya Nerovnostei Poverkhnosti),

Abstract

This paper presents the results of experimental investigations of the effect of surface roughness on cavitation. The investigations consisted of water-tunnel tests of roughness models in which standard techniques were used to investigate the region of cavitation. By means of high-speed motion pictures of the region of cavitation behind roughness models, the periodicity of cavitation formation with respect to time in the initial stages of development is demonstrated. The periodicity of the development of cavitation is shown to conform to the Strouhal law. An hypothesis is formulated with regard to the inception of cavitation on the axis of the vortices in the region of separated flow behind the roughness at the moment the vortex attains its maximum diameter. (Modified author abstract)

Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1955
Accession Number
AD0783419

Entities

People

  • K. K. Salnev

Tags

DTIC Thesaurus Topics

  • Abstracts
  • Cavitation
  • Diameters
  • Motion Pictures
  • Periodic Variations
  • Physical Properties
  • Roughness
  • Standards
  • Surface Roughness
  • Tunnels
  • Water Tunnels

Readers

  • Fluid Mechanics and Fluid Dynamics.
  • Underwater engineering and Marine Technology.