PETN Particles in a Gas-Detonation Wave
Abstract
To account for the development pattern of detonation by weakly initiating powdered high explosives (HE) an investigation of interacting HE particles with a high-enthalpy gas flow was performed. The results of experiments of an ignition of PETN particles by gas-detonation wave is reported. The radiation intensity of detonation products (DP) was recorded by several wave lengths simultaneously with using of a multiwave pyrometer. This enabled us to define the time of the reaction beginning in HE by change in a spectrum of DP radiation with particles and without them. The PETN decomposition was recorded in all experiments under varying of the initial pressure P of a gaseous mixture from 0.1 to 0.4 MPa. But from P = 0.3 Mpa the velocity of PETN combustion increased more than in 10 times. It was shown, as a result of breaking the melted layer at particles the sharp extension of HE surface occurs. The HE surface increases by more than one order of magnitude. It causes the increase of the integral reaction rate. The process is of a threshold nature: a fragmentation will occur if the melted layer thickness greater than some critical value.
- Publication:
-
APS Shock Compression of Condensed Matter Meeting Abstracts
- Pub Date:
- July 1997
- Bibcode:
- 1997APS..SHK..L113G