Expansion Dispersion and Lateral Loss in

Detonation (and Explosion), Lateral Expansion (Dispersion) and Lateral Loss in. 

When a cylindrical charge of an explosive is detonated, its expansion proceeds not only forward and backward along the cylinder axis, but also laterally along the radius. The greater the diameter of cylinder, 

Expansion of the expln products in the forward direction in a cylinder is accompanied by compression of new layers previously undisturbed in the xplosion and this causes some loss of energy, which is considered, however, not as a loss, but as a normal part of the detonation process. Expansion of the expln products in the rearward direction proceeds more slowly as the path traversed by the wave in the explosive becomes greater, i.e., the thicker the layer of compressed expln products behind the wave becomes, the more slowly the expansion proceeds. Thus for a large chge diam, the more powerful is the initiator causing the initial wave, the smaller are the losses at the origin of propagation of detonation. 

As the wave evolves from that point, the losses connected with rearward expansion decrease. If a charge of a small diam is considered, then lateral expansion depends on the path over which the wave has traveled. The increase in cross section of a cylinder, i.e., expansion in the lateral direction, leads to a reduction in pressure and to a decrease in the deton velocity in comparison with detonation propagating in a constant cross-section cylinder. The decrease in deton vel causes, in turn, the diminution of shock amplitude wave and impairs the conditions under which the reaction can proceed. The loss caused by lateral expansion is known as lateral loss. Propagation of detonation is possible only if this loss is not smaller than a certain limit, which is characteristic for each expl 

In the case of a condensed HE, the lateral expansion proceeds with a velocity of the same order as the velocity in forward direction (Ref 6, p 215-16) 

---

Detonation, Sideways Expansion in. See Detonation, Lateral Expansion (Dispersion) and Lateral Loss in . Called by G.B. Kistiakowsky "radial expansion ... 

Expln, lateral dispersion (expansion) and lateral loss in 4 D421—D423... 

Explosion, Lateral Dispersion (Expansion) and Loteroi Loss in. See Vol 4, pp D421-R to D423-L... 

---