Peculiarities of planar shockwave interaction with air-water interface and solid target

• We present the results of the research on underwater electrical explosion of planar copper wire arrays, accompanied by the generation of a planar shock, using the synchrotron-based phase-contrast radiography imaging capabilities of the ID19 beamline at the European Synchrotron Radiation Facility. It is shown that the interaction of a strong shock with an air-water interface leads to additional acceleration of the wire expansion due to a rarefaction wave along with the emergence of micro-jets. In the case of a target placed above the array, we observed the formation of a cavity between the array and the target due to the interaction of two rarefaction waves. The results of two-dimensional hydrodynamic simulations of the wire explosion and the interaction of the generated shock with the water-Air and water-Target interfaces showed good agreement with experimental results. 

Subject headings

TEKNIK OCH TEKNOLOGIER  -- Maskinteknik -- Strömningsmekanik och akustik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Mechanical Engineering -- Fluid Mechanics and Acoustics (hsv//eng)

Keyword

Air

Phase interfaces

Synchrotron radiation

Wire

Air/Water Interfaces

Copper wires

Imaging capabilities

Phase-contrast radiography

Planar shocks

Rarefaction waves

Shockwave interactions

Solid targets

Underwater electrical explosions

Wire arrays

Synchrotrons

Publication and Content Type

ref (subject category)

art (subject category)