Transient processes in the impact initiation of TNT

Abstract

As well as experimental methods, the method of mathematical modeling is now used in investigating processes of detonation excitation in condensed explosives. In constructing a mathematical model of the initiation of heterogeneous explosives, the material in the chemical-reaction region behind the shock-wave front is represented, as a rule, in the form of a mixture of unreacted explosives and detonation products (DP). Modern experimental methods do not allow measurements of the gasdynamic and thermodynamic parameters of the individual components in the reaction region to be made and, therefore, in developing the model, it is necessary to use certain assumptions regarding the evolution of the initiation process. The most common for all models, in practice, are the assumptions that the reaction develops from individual sources (hot points) and that the mass velocities and pressures of the individual components in the reaction region are equal. In [I, 2], the temperatures were also assumed to be equal.