Accession Number : ADA322534

Title :   Three-Phase Combustion Modeling: Frozen Ozone, a Prototype System.

Descriptive Note : Final rept. 1 Jun 94-1 Dec 95,

Corporate Author : ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD

Personal Author(s) : Miller, Martin S.

PDF Url : ADA322534

Report Date : MAR 1997

Pagination or Media Count : 36

Abstract : A number of efforts are currently underway in the United States to model the self-sustained combustion of solid energetic materials at the level of fundamental physical processes and elementary chemical reactions. Since many of these materials burn, at least at some pressures, with a liquid surface layer, these models must address phenomena in three physical phases. Most of these modeling efforts have focused on pure RDX as a prototype. From a systems viewpoint, this was a natural choice, since it, or materials like it, is one of the components of modern propellants. It is argued here that, from a scientific viewpoint, RDX is already too complex with too many uncertain mechanisms and unavailable supporting data to serve this role effectively. We discuss here a number of issues related to the condensed phase and interfacial phenomena which have not been previously identified and which warrant more detailed research. In this report, frozen ozone is adopted as a more suitable prototypical three-phase system, and progress toward addressing this system is presented. The first new process modeled was a gas/surface reaction. A detailed analysis was performed on the reaction mechanisms at play in the ozone flame and how they are affected by the heterogeneous reaction. Other new mechanisms are associated with the multicomponent nature of the liquid surface layer and will be addressed in future work.

Descriptors :   *MODELS, *SOLIDS, *COMBUSTION, *FREEZING, *ENERGETIC PROPERTIES, *OZONE, *RDX, INTERFACES, LAYERS, LIQUIDS, PHYSICAL PROPERTIES, COMPOSITE MATERIALS, PROTOTYPES, GASES, PROPELLANTS, PURITY, CHEMICAL REACTIONS, SELF OPERATION, SURFACE REACTIONS, HETEROGENEITY, FLAMES.

Subject Categories : Physical Chemistry
      Combustion and Ignition
      Ammunition and Explosives

Distribution Statement : APPROVED FOR PUBLIC RELEASE