Accession Number:

AD0783419

Title:

Cavitation of Surface Roughnesses (Kavitatsiya Nerovnostei Poverkhnosti),

Descriptive Note:

Corporate Author:

NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA MD

Personal Author(s):

Report Date:

1955-12-01

Pagination or Media Count:

27.0

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

Subject Categories:

  • Fluid Mechanics
  • Jet and Gas Turbine Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE