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Fluid Mechanical Processes of Deflagration to Detonation Transition in Beds of Porous Reactive Solids.
Interim technical rept. no. 2, Jul 78-May 80,
ILLINOIS UNIV AT URBANA-CHAMPAIGN DEPT OF AERONAUTICAL AND ASTRONAUTICAL ENGINEERING
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The fluid mechanical processes which characterize a transition from deflagration to detonation in granular beds of solid propellant have not at present been sufficiently refined to allow accurate modelling of the phenomenon. In an attempt to improve this situation, this report has investigated what might be considered basic mechanisms and consequences that arise from a set of assumptions for the governing and constitutive equations which take into account the two phase nature of this problem. A qualitative description of the flow process is made, based on observations obtained from DDT experiments. From this, certain conclusions are reached as to the properties needed by propellants to exhibit a deflagration to detonation transition DDT. The numerical integration scheme itself is examined in detail in order to further understand the consequences of its use.
APPROVED FOR PUBLIC RELEASE