TRANSITION FROM SLOW BURNING TO DETONATION: FURTHER STUDIES OF THE FREE VOLUME AND THE LOW VELOCITY REGIME IN CAST PENTOLITE
Abstract
No effect of free volume introduced near the ignition wire could be detected in the experimental pressure-time curves for confined burning of an explosive. Rupture of the DDT tubes in the region of confined burning, for shots exhibiting transition to detonation, occurs more than 100 micro sec after a pressure of 1 kbar is first attained; the plastic deformation of the tube requires more than 45 micro sec. The long duration of the confinement and the pressure rises observed indicate that initiating pressures for DINA and pentolite are reached in the burning area near the igniter. A 1/4-in. thick Lucite filter in the path of the subsonic ionization front, downstream from the burning area, has no detectable effect on the propagation of the front. This disturbance is therefore pressure-initiated and propagated; it is not a flame front.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 12, 1963
- Accession Number
- AD0403766
Entities
People
- Donna Price
- G. E. Roberson
- J. F. Wehner
Organizations
- Naval Ordnance Laboratory