Modeling of Compaction Wave Behavior in Confined Granular Energetic Material
Abstract
The successful transition to detonation in confined granular energetic material requires formation and maintenance of a strong compressive wave system which ignites unburned material in its path. The present investigation is directed toward an interpretation of this wave, before a full detonation wave has been established. For several years, the Naval Surface Warfare Center / White Oak has been investigating the effects of impact on confined quiescent granular material with an apparatus known as the piston- driven-compaction (PDC) experiment. This report summarizes four modeling efforts developed by the author to understand the behavior of impact-generated compaction waves as observed by NSWC in the PDC experiment, often within the simplest possible framework. These include (a) inert compaction waves governed by rate-dependent porosity adjustments, (b) quasi-steady compaction waves which account for wave-induced reaction and assume instantaneous adjustment to the equilibrium stress state, (c) collision of reactive compaction/shock waves, and (d) a transient reactive shock wave model which accounts for wave-induced reaction, gas-phase combustion of a reactive intermediate species, and transient combustion of the granular solid. Keywords: Granular propellants, Explosives impact, Compaction waves modeling, Combustion, Deflagration, Transition to detonation.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1990
- Accession Number
- ADA226435
Entities
People
- Douglas E. Kooker
Organizations
- Ballistic Research Laboratory