THE HYDRODYNAMICS OF UNDERWATER JET PROPULSION

Abstract

Force measurements were obtained with a new sensitive balance for a range of nose shapes and cavitation parameters (K) under conditions of open- cavity flow. Drag-coefficient (CD) data were obtained for a 12- to 25-ft/sec range on model sizes ranging from 0.500 to 1.414 in. in diameter for the sharper cone. The experiments indicate a remarkable consistency and a close check with the theory. Two exceptions were noted: flow discrepancies, about sharphy pointed cones, with those indicated by the approximate cavity-drag theory of Plesset and Shaffer; and definite slope differences (which increase with decreasing cone angle) of the experimental curve with the line given by CD+CDO(1 + K).

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1953
Accession Number
AD0010090

Entities

People

  • J. P. O'neill

Organizations

  • California Institute of Technology

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Cavitation
  • Coefficients
  • Consistency
  • Drag
  • Dynamic Pressure
  • Experimental Data
  • Jet Propulsion
  • Measurement
  • Military Research
  • Pressure Distribution
  • Projectile Noses
  • Surface Waters
  • Three Dimensional
  • Tunnels
  • Two Dimensional
  • Water Tunnels

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.
  • Marine Propulsion Engineering and Naval Architecture
  • Mathematics or Statistics