Detonation Initiation and Propagation in a Cylindrical TATB Charge
N. A. Volodina, A. V. Erastov, P. V. Zabusov, M. N. Kiryukhina, K. N. Panov, V. B. Titova, M. O. Shirshova
All-Russian Research Institute of Experimental Physics, Sarov, Russia
Keywords: detonation kinetics, TATB, X-ray technique, numerical modeling
Abstract
The process of detonation propagation in semi-annular charges made of plasticized TATB with a steel shell inside during initiation of normal detonation along a line on the outer surface of the charge was studied using the X-ray method. In the experiments, the shape of the detonation wave front was determined using the X-ray method at different moments in time. The experiments recorded the effect of a layer of plastic explosive based on hexogen located on the surface of the main charge and having a detonation velocity ≈10% higher than that of TATB on the shape of the detonation front. The experimental position and shape of the detonation wave front in a cylindrical TATB charge are not described by the laws of geometric optics (Huygens principle) due to the peculiarities of detonation initiation in the initial section and the presence of a steel shell. Numerical modeling of the experiments was carried out using the LEGAK technique using macroscopic detonation kinetics. A similar to the experimental picture of the initiation and propagation of detonation in the TATB charge was obtained. A theoretical analysis of the features of the propagation of the detonation wave was carried out.
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