Hydrodynamics Calculations of the Fast Shock Tube Drived by High Explosive

A phased implosion in a cylindrically high explosive (HE) shell can form extremely high pressures and energy densities in a low-density foam core within shell. In a properly designed system, the flow of compressed foam approaches a steady state nozzle flow with the same velocity as that of detonation. The propagating wave decouples from the flow behind the sonic point. The flow can be used to produce shockless acceleration of masses to hypervelocities. The numerical simulations show the formation of the axial shock from the start to its approaching of its steady state, which is in good agreement with the theoretical analysis.