Plane shock wave interaction with a cylindrical water column

Författare: Sundarapandian, S.S., Liverts, M., Tillmark, N.T., Apazidis, N.
Dokumenttyp: Artikel
Tillstånd: Accepterad
Tidskrift: Physics of Fluids
År: 2016


A complex system of waves propagating inside a water column due to the impact of plane shock wave is investigated both experimentally and numerically. Flow features, such as, focusing of expansion waves generating large negative pressure, nucleation of acoustic cavitation bubbles and re-circulation zone are observed and discussed qualitatively and quantitatively. Experiments are conducted on a 22 mm diametrical water column hit by shock waves with Mach numbers 1.75 and 2.4 in a newly constructed exploding wire facility. A new technique to create properly shaped, repeatable, large diameter water column with straight walls is presented. Qualitative features of the flow are captured using shadowgraph technique. With the aid of numerical simulation the wave motions inside the column are analyzed; the spatial location of the expansion wave focusing point and the corresponding negative peak pressures are estimated.