Vortex Rings from Underwater Explosions

Abstract

Vortex rings were produced explosively in water with enough intensity to cavitate their cores. Such cavitation limits the velocity which can be imparted to vortex rings at shallow depths. Vortex rings were produced by explosions in short cups or gun tubes, rather than in the customary cylindrical containers with orifice plates. One advantage of the cups is that relatively large rings are formed outside the cup lips. The following conclusions were drawn from the measured data. The impulse applied to a flat plate by an adjacent underwater explosion can be increased five times by enclosing the charge in a short cylindrical cup whose length and radius are about 25 times larger than the radius of an equivalent TNT sphere. Thin-walled cups which subsequently collapsed were nearly as effective as thick cups for generating single vortex rings.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1969
Accession Number
AD0854771

Entities

People

  • A. R. Kriebel

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Bubbles
  • Cameras
  • Cavitation
  • Containers
  • Deep Submergence Vehicles
  • Dredging
  • Energy
  • Explosions
  • Explosive Charges
  • Explosives
  • Flow
  • Generators
  • Kinetic Energy
  • Military Research
  • Shallow Depth
  • Thrusters
  • Underwater Explosions

Fields of Study

  • Physics

Readers

  • Combustion Dynamics and Shock Wave Physics.
  • Combustion and Flow Dynamics.
  • Military Engineering.