Accession Number:

ADA083889

Title:

Analytical Models for the Compressive Heating Ignition of High Explosives

Descriptive Note:

Final rept.

Corporate Author:

ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD

Personal Author(s):

Report Date:

1980-03-01

Pagination or Media Count:

44.0

Abstract:

Two one-dimensional models to predict the temperature history of an explosive surface subject to compressive heating from the rapid collapse of an adjacent air layer are reported herein. Computations made using the more sophisticated finite compression-rate model show qualitative agreement with the experimental behavior while results obtained from the simpler adiabatic compression model are sometimes misleading. The most important observation is that planar one-dimensional gap closure cannot explain ignition as observed in experiments. Several multidimensional effects have been introduced into the models. The results show that enhanced energy transport caused by convection and turbulence must be present in conjunction with rapid local pressurization andor convergent air-flow, unless the enhancement is confined to a boundary layer adjacent to the explosive. In addition, the dieseling mechanism of sensitization has been considered indicating that explosive particle sizes small enough to exhibit increased temperature may be present.

Subject Categories:

  • Ammunition and Explosives
  • Fluid Mechanics
  • Combustion and Ignition

Distribution Statement:

APPROVED FOR PUBLIC RELEASE