Heat of explosion of commercial and brisant high explosives |
| |
Authors: | V I Pepekin S A Gubin |
| |
Affiliation: | (1) Semenov Institute of Chemical Physics, Moscow, 117977 |
| |
Abstract: | Methods for determining the heat of explosion of high explosives (HEs) with ideal and nonideal processes of explosive decomposition
are considered. It is shown that the heat of explosion is of significance for estimating the efficiency of commercial HEs
and is used in the energetic characterization of the working capacity. The heat of explosion of brisant HEs is only part of
the blast heat of explosion and is the heat content of gaseous detonation products during their isentropic expansion from
the initial state to a certain expansion ratio (determined by experimental conditions). The heat of explosion can be obtained
by thermodynamic calculations based on physically justified equations of state for fluids (gaseous detonation products in
the chemical-reaction zone of the detonation wave in the supercritical state) and condensed nanocarbon phases (nanographite,
nanodiamond, and liquid carbon). Experimental and calculated values of the heat of explosion are given. The thermodynamic
calculation is inapplicable to commercial HEs because of the nonideal nature of their detonation. The heat of explosion of
commercial HEs can be calculated using the Hess law. The heat of explosion of brisant HEs is not a measure of power. The power
of HEs is characterized by the propellant performance. It is shown that even detonation velocity cannot be a measure of the
power of HEs. The power and detonation parameters of brisant HEs are determined by the energy release density in unit volume
of the chemical-reaction zone of the detonation wave and by the rate of energy release from the shock front rather than by
the heat of explosion, which cannot be considered a universal characteristic.
__________
Translated from Fizika Goreniya i Vzryva, Vol. 43, No. 2, pp. 100–107, March–April, 2007. |
| |
Keywords: | heat of explosion commercial and brisant HEs thermodynamics |
本文献已被 SpringerLink 等数据库收录! |
|