Analysis of deflagration to detonation transition in high-energy solid propellants

Abstract Increasing the nitramine content of solid rocket propellants increases the overall performance of the system as well as the sensitivity to detonation by shock initiation. Under certain circumstances Deflagration to Detonation Transition (DDT) can occur in granulated high-energy solid propellant. The work presented here represents an effort to model the DDT process. The emphasis is on the transient events prior to the detonation as well as the steady-state detonation conditions. A Method of Lines (MOL) computer solution technique is used to solve the system of partial differential equations describing one-dimensional, two-phase, reactive flow. The Chapman-Jouguet (CJ) properties, detonation run-up distance, and detonation velocity predicted by the computer code compare favorably with experimental data and the steady-state detonation predictions made using the TIGER chemical equilibrium computer code.

[1]  Stephen C. Cowin,et al.  A continuum theory for granular materials , 1972 .

[2]  Andrej Maček,et al.  Transition from Deflagration to Detonation in Cast Explosives , 1959 .

[3]  J. Nunziato,et al.  On ideal multiphase mixtures with chemical reactions and diffusion , 1980 .

[4]  C. H. Johansson,et al.  Detonics of high explosives , 1970 .

[5]  A. Sulimov,et al.  Propagation of predetonation regimes in porous explosives , 1969 .

[6]  P. B. Butler,et al.  Shock Development and Transition to Detonation Initiated by Burning in Porous Propellant Beds , 1981 .

[7]  R. Bernecker,et al.  Studies in the transition from deflagration to detonation in granular explosives—II. Transitional characteristics and mechanisms observed in 91/9 RDX/Wax , 1974 .

[8]  H. Krier,et al.  COMBUSTION AND FLAME SPREADING PHENOMENA IN GAS-PERMEABLE EXPLOSIVE MATERIALS , 1975 .

[9]  R. Bernecker,et al.  Sensitivity of porous explosives to transition from deflagration to detonation , 1975 .

[10]  H. Krier,et al.  Fluid Mechanics of Deflagration-to-Detonation Transition in Porous Explosives and Propellants , 1981 .

[11]  A. Sulimov,et al.  Transition from combustion to detonation in porous explosives , 1969 .

[12]  G. Wallis.  One Dimensional Two-Phase Flow , 1969 .

[13]  H. Krier,et al.  Modeling of Convective Mode Combustion through Granulated Propellant to Predict Detonation Transition , 1978 .

[14]  R. Bernecker,et al.  Studies in the transition from deflagration to detonation in granular explosives—I. Experimental arrangement and behavior of explosives which fail to exhibit detonation , 1974 .