An Investigation of Cavity Cycling for Ventilated and Natural Cavities.

Abstract

The frequency of cavity cycling due to the re-entrant jet was measured for a 45 degrees conical-nosed model having a 1-inch diameter afterbody. Spectral analyses of the output of an internally mounted transducer were performed to determine the cycling frequency. The cavity cycling was also measured from high-speed movies taken of the model cavitation. Data for both natural (vaporous) and ventilated cavities were obtained and compared with data from hydroballistics tank tests of NSWC and previous water tunnel tests. The cavity cycling frequency presented as a Strouhal number increases with cavitation number. Frequency data, measured by the transducer, for vaporous cavitation were higher than the results for similar ventilated cavities. However, measurements from high-speed movies show close agreement between cycling frequency for both types of cavitation. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Feb 07, 1983
Accession Number
ADA130641

Entities

People

  • D. R. Stinebring
  • J. W. Holl
  • Michael L. Billet

Organizations

  • Pennsylvania State University

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Analyzers
  • Ballistics
  • Classification
  • Diameters
  • Frequency
  • Geometry
  • Instrumentation
  • Measurement
  • Navy
  • Pennsylvania
  • Security
  • Spectrum Analyzers
  • Strouhal Number
  • Surfaces
  • Transducers
  • Universities
  • Water Tunnels

Readers

  • Fluid Dynamics.
  • Marine Ecotoxicology
  • Microwave Engineering.