Determination of Detonation Parameters by coupled with considering shock compression character of aluminum in detonation reaction zone and second-order reaction theory of aluminized explosives

Abstract

The theoretical and accurate determination of the detonation parameters of explosives is a key issue in the design of a reasonable composition of explosives.In this paper, theoretical computing method for determination of detonation parameters was established by coupled with considering shock compression character of aluminium in detonation reaction zone and second-order reaction theory of aluminized explosives.The BKW equation of state was chosen as the state equation of the detonation product, and the state equation of Cowan was applied as the state equation of condensed carbon in the detonation product. The thermodynamic state quantities of the gaseous product were determined by applying the BKW equation of state to the relational expression between the thermodynamic state quantities. In addition, the condensed phase carbon (graphite) as a solid product was considered and the Cowan equation of state was used to determine the thermodynamic state quantities of the solid product. A algorithm of the detonation parameters calculation of aluminized explosives by Gibbs free energy minimization principle was constructed, the detonation parameters were calculated and compared with the experimental values. The calculated values of detonation velocity are below 4.0% and the calculated values of detonation pressure have relative errors below 6.8% and the experimental values.