Accession Number:

ADB001218

Title:

Fundamental Aspects of Unconfined Explosions

Descriptive Note:

Final rept. 22 Jan 1973-2 Feb 1974

Corporate Author:

MICHIGAN UNIV ANN ARBOR DEPT OF AEROSPACE ENGINEERING

Report Date:

1974-08-01

Pagination or Media Count:

97.0

Abstract:

Blast wave initiation of detonation in a completely homogeneous cloud is considered. The self similar character of strong blast waves and Chapman- Jouguet detonation waves is used to arrive at simplified closed form solutions for the generation of ground impulse and dynamic impulse, up to the time that the detonation arrives at the edge of the cloud. The dependence of impulse on fuel properties and cloud geometry is predicted. The influence of side relief at the top of the cloud is considered. Experimental studies are described which investigate the initiation, transition, and quasi-steady propagation processes associated with blast initiated, cylindrical detonation waves. Experiments were conducted with all gaseous and heterogeneous fuel-air mixtures wherein a specially designed sectored shock tube was employed. A complete volumetric range of MAPP Methyl acetylene, propane, propadiene-air mixtures was investigated. some results on the breakup and ignition of single fuel drops, when subjected to strong blast waves, are presented.

Subject Categories:

  • Ammunition and Explosives
  • Explosions

Distribution Statement:

APPROVED FOR PUBLIC RELEASE