Abstract

Shock pressure of overdriven detonation is above the CJ pressure. We use here our reactive flow model TDRR (=Temperature Dependent Reaction Rate) to calculate examples of overdriven detonation, including details of the reaction zone. The explosive is PBX-9502, and the detonation shock pressure for different examples is below and above the intersection pressure of the reactant and products Hugoniot curves. We find that: 1) below that intersection, as well as above it, the reaction zone is on the corresponding Rayleigh line, like for a CJ detonation; 2) below the intersection, pressure decreases along the reaction zone, as for a CJ detonation, but above the intersection, pressure increases along the reaction zone; 3) for a shock pressure above the intersection point, the reaction zone is continuous, smooth, and without any peculiarities.

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