Accession Number:

ADA231761

Title:

The Interaction Phenomena between Adjacent Detonating Layers

Descriptive Note:

Final rept. 15 Jan 1987-15 Jul 1990

Corporate Author:

MICHIGAN UNIV ANN ARBOR GAS DYNAMICS LABS

Personal Author(s):

Report Date:

1991-01-15

Pagination or Media Count:

12.0

Abstract:

An experimental and theoretical study of the interaction which occurs when a detonation initiated in a primary explosive layer comes into contact with a bounding or secondary explosive layer was the subject of this research program. This process is of interest in connection with shaped charge design, explosive devices under consideration for clearing mine fields, and with layered explosive design to increase the efficiency of explosive energy transmission. In addition to these applications, this interaction is also of fundamental interest since interactions of this type are involved in the diffraction of detonations, the propagation of detonations over obstacles, and the transition from deflagration of detonation. It also has been found that layered gaseous explosives can be used to generate oblique detonation waves which are of interest in connection with oblique detonation ram jets, and hypervelocity accelerators. The interaction between the explosive layers has been simulated numerically using the Flux Corrected Transport FCT algorithm. The simulation produced pressure, temperature, density and reactant contours throughout the interaction region as well as the pressure signature on the walls bounding the interaction region which were in excellent qualitative agreement with the experiments. The shape of the blast wave which propagates into the secondary explosive during the initial stage of the interaction just as the primary detonation comes into contact with the bounding explosive mixture has also been computed analytically using Whithams method. The resultant refraction patterns were in close agreement with experimental observations.

Subject Categories:

  • Explosions

Distribution Statement:

APPROVED FOR PUBLIC RELEASE