Nonclassical detonation regimes of pressed and liquid explosives (Review)

Combustion, Explosion, and Shock Waves - This paper presents a review of studies of the characteristics of condensed explosives in the reaction zone of which the distribution of parameters does not...     

Reproducibility of Detonation Parameters of Mixtures of Tetranitromethane with Methanol and Nitrobenzene

Combustion, Explosion, and Shock Waves - A VISAR multipoint laser interferometer is used to study a detonation wave structure in mixtures of tetranitromethane with methanol and nitrobenzene. A poor...     

Thermodynamic properties of a fluid at high pressures

We present formulas for the thermal coefficients of a fluid at high pressures. The formulas are obtained on the basis of the Tate equation of state. Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 70, No. 2, pp. 236–238, March–April, 1997.     

Structure of detonation waves in nitromethane and a nitromethane/methanol mixture

The results of experimental studies of the structure of the reaction zone for steady-state detonation of nitromethane and its mixtures with methanol. For pure nitromethane, the characteristic reaction time and detonation parameters were determined. For a nitromethane/methanol mixture, a dependence of the detonation parameters of the mixtures on methanol concentration is presented. It is shown that in pure nitromethane and with small additions of methanol, the detonation front is stable, or the size of the inhomogeneities of the front is less than 1 m. At a methanol concentration of 10% or higher, instability of the front is observed.     

Effect of diethylenetriamine on the structure of detonation waves in nitromethane

This paper presents the results of experimental studies of the reaction zone structure in steady-state detonation of nitromethane sensitized by diethylenetriamine (DETA). The concentration of DETA was varied within 0.0125–15%. It is shown that small additions of DETA lead to a qualitative change in the flow pattern in the reaction zone. After the shock, the mass flow rate continues to increase for about 10 ns, reaches a maximum, and only then decreases. The amplitude of the chemical spike decreases by an order of magnitude. These features are explained by the decomposition of nitromethane sensitized by DETA in front of the shock wave, which is due to a sharp increase in the initial reaction rate.     

Heat transfer during condensation of vapor on a laminar jet of liquid with an initial segment

Heat transfer during condensation of vapor on a laminar jet of liquid is numerically analyzed, taking into account the initial segment.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 40, No. 4, pp. 581–585, April, 1981.     

Laminar film condensation on sphere with entrance zone

Film condensation on a sphere is numerically analyzed, taking into account inertia and convection terms. An expression is derived for calculating the mean Nusselt number.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 47, No. 2, pp. 181–184, August, 1984.     

Effect of small additions of diethylenetriamine on the width of the reaction zone in detonation waves in nitromethane

This paper presents the results of an experimental determination of the width of the reaction zone in a detonation wave in nitromethane sensitized by diethylenetriamine. It was found that increasing the mass concentration of diethylenetriamine from 0 to 2.0% reduced the typical reaction time by a factor of less than two while the critical diameter decreased by an order of magnitude. This discrepancy is explained by the fact that the critical detonation diameter of neat nitromethane is determined not by the reaction time but by flow instability at the edge of the charge, manifested in the occurrence of a wave of reaction disruption. Increasing the initial rate of nitromethane decomposition by addition of diethylenetriamine leads to flow stabilization and thus to a change in the nature of the critical diameter.