The Interface Instability of the Flyer Driven by Explosion

The interface instability of a flyer driven by one dimensional or by sliding explosive detonation was studied. The computational results for one dimensional driving are in accord with the experimental results. For sliding explosion, however, there exist no experimental results to compare with, only the computational result is given, which shows a phase shift accompanying with an amplitude increasement due to the Helmholtz instability. Both the flyer and the detonation products were considered as the ideal and incompressible fluid. From the mass and momentum equations and the interface continuation conditions, the relative differential equations were deduced via the method of small perturbation, and then resolved numerically.