The MES Code:Chemical-Equilibrium Detonation-Product States of Condensed Explosives

摘要

The MES code calculates states of the reaction products of detonation in gaseous or condensed explosives under the assump¬tion of thermal and chemical equilibrium. The products may con¬sist of any number of gaseous species and one solid species. The condition of equilibrium includes the number of phases:the solid may or may not be present depending on the current state. In addition to the primary calculation of the Chapman-Jouguet state at a specified set of initial densities, the detonation Hugoniot, and contours of constant temperature, density, energy, or entropy, each at a specified set of pressures may be obtain-ed. All of the first derivatives (e.g., sound speed and heat capacity) are calculated at each point.nThe solid equation of state is one constructed from a given shock Hugoniot under the assumption of constant Gruneisen coef¬ficient. For the gas, either the ideal gas, the Kistiakowsky-Wilson, or the LJD (Lennard-Jones-Devonshire cell theory) equa¬tion of state may be used. Several choices of "mixture rules" for extending the last one, a pure-fluid equation of state, to mixtures are offered. For LJD, the input data are the parame¬ters defining the intermolecular potentials of the species.