Abstract
Cylindrical imploding shocks are analyzed numerically. The shocks are supposed to be generated by detonating cylindrical explosive shells. Detonations are assumed to be initiated either from the inner or the outer surface of the shells. Explosive shells of different thicknesses are compared. The conversion mechanism of the chemical energy of explosives into gas energy is investigated. In the implosion stage general features of the flow near the shock front are much the same between two different initiations. The same is also true among different explosive thicknesses. However, in the reflection stage after the shock is reflected from the axis, thicker explosives produce higher pressure and temperature near the axis. The difference in the initiation method does not make a very noticeable difference, even in the reflection stage. Shock trajectories, temperatures at the shock front, and evolutions of the pressure at a fixed point are compared between numerical and experimental results. Agreements between the two results are close.
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