THE THERMAL BEHAVIOR OF EXPLOSIVES SUBJECTED TO SIMULATED AERODYNAMIC HEATING, III

Abstract

IGNITION TIME AND HEAT FLOW WERE MEASURED FOR 6 EXPLOSIVES, TESTED IN ONE-DIMENSIONAL, UNCONFINED ANALOGUES OF CYLINDRICAL, STEEL-CASED WARHEADS. They were unidirectionally heated at rates corresponding to aerodynamic heating associated with the sea-level flight of supersonic missiles and aircraft at low Mach numbers. With heating rates up to 100 C/min the runaway reaction occurs as a rapid deflagration beginning on the explosive's surface touching the steel case. When a temperature of 455 C was applied to the outer surface of the 1-cm thick steel warhead case, the explosive ignition times were: tetryl - 135 sec; TNT - 164 sec; PBX N-1 - 180 sec; pentolite - 139 sec; H-6 - 169 sec; and Comp. - 202 sec. PBX 9404 showed a small but inconclusive increase in impact-hammer sensitivity (the 50% point changed from 26 to 31 cm) after 3 thermal cycles between 20 C and 200 C. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jul 25, 1961
Accession Number
AD0326783

Entities

People

  • B. E. Drimmer
  • N. L. Coleburn

Organizations

  • Naval Ordnance Laboratory

Tags

Communities of Interest

  • Counter IED
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aerodynamic Heating
  • Air Force Facilities
  • Aircrafts
  • Aluminized Explosives
  • Ammunition
  • Explosions
  • Explosives
  • Flight
  • Heat Transfer
  • Heat Transmission
  • Materials Laboratories
  • Materials Science
  • Munitions
  • Ordnance Laboratories
  • Pentolite
  • Plastic Bonded Explosives
  • Weapons

Fields of Study

  • Physics

Readers

  • Aerodynamics/Aeronautics.
  • Rocket Propulsion.
  • Thermal Physics or Thermal Science.

Technology Areas

  • Hypersonics
  • Hypersonics - Hypersonic Flow