Reparametrization of the BKW Equation of State for CHNO Explosives which Release no Condensed Carbon upon Detonation

The BKW equation parameters and gaseous product co-volumes were reparametrized for CHNO explosives which release no condensed carbon when detonated. This estimation has led to a more reliable (correct) parameter set of the BKW equation because all of the possible errors due to the uncertainties in the phase composition and equation of state for nanoscale condensed carbon, the inhomogeneity of composite explosives, and so forth, are eliminated. The estimation was performed using an optimization database of 24 explosives, including 121 measurements of detonation velocity and pressure. Three parameters of the BKW equation and the co-volumes of 45 gaseous products were optimized. A set of 10 explosives having a small negative oxygen balance was checked. The resulting set provides a several-fold smaller error in calculating the detonation velocity and a more accurate prediction of the detonation pressure, as compared to the known sets of BKWRDX, BKWR, BKWS, and BKWC.