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Detonation Studies in Dispersed Solid Particulate Explosives Using High Speed Time-Resolved Holography

Published online by Cambridge University Press:  15 February 2011

Michael J. Ehrlich,
James W. Wagner,
Jacob Friedman and
Heinrich Egghart
Michael J. Ehrlich
Affiliation:
The Johns Hopkins University, Center for Nondestructive Evaluation, Department of Materials Science and Engineering, Baltimore, MD 21218
James W. Wagner
Affiliation:
The Johns Hopkins University, Center for Nondestructive Evaluation, Department of Materials Science and Engineering, Baltimore, MD 21218
Jacob Friedman
Affiliation:
The Johns Hopkins University, Center for Nondestructive Evaluation, Department of Materials Science and Engineering, Baltimore, MD 21218
Heinrich Egghart
Affiliation:
US Army Belvoir Research, Development and Engineering Center, Fort Belvoir, VA
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Introduction

Clouds of dispersed explosive or combustible solid particles are detonable and such systems may exhibit self-sustained detonation [1–8]. However, the method by which individual particles in the explosive cloud interact to sustain detonation is not well understood. The similar case of liquid fuel/air explosives was investigated in detail during the 1960's and 1970's. For these systems, it was established that incident shock waves serve to shatter large liquid droplets into a mist of micro-droplets. These microdroplets are almost instantaneously accelerated to the convective flow velocity behind the shock wave. The energy released upon ignition of the micromist supports the shock wave and selfsustained detonation results [9–11].

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