Experimental Study on Dynamic Behavior of the Collision Region of Lead Tube Driven by Cylinderical Implosion

Dynamic behaviors of the collision region of lead tube driven by cylinderical implosion were experimentally investigated by high-speed frame photography and pulsed X-ray radiography. Experimental results showed that a leading jet-like spiking happened in the collision region, and the spiking demonstrated obvious instability tendency. Due to the existence of high pressure in the collision region, lead may be melted and transformed into liquid without shear strength. Shock-melting may be the main reason for the occurrence of the jet-like spiking in the collision region of lead tube. Additionally, three leading spikings observed in the collision region is reported for the first time. Preliminary analysis attributed the above phenomenon to the reflection and superposition of waves caused by head-on collision of two detonation waves, and the detailed reason should be further analyzed in future work.