The results of experimental and numerical research of shockwaves generated by the underwater electrical explosion of a single wire and a planar wire array are reported. Experiments were conducted using a microsecond time scale pulse power generator delivering a <210 kA current with a <1 μs rise time. Streak and fast framing cameras were used to study the time- and space-resolved evolution of the shocks. The results show that (a) an aperiodic discharge constitutes the most efficient method of generating a shockwave; (b) in the case of a planar wire array, an almost simultaneous explosion can be obtained when the individual wire diameter is <100 μm (current density >2 × 107 A/cm2); (c) the planar shock velocity can be accelerated using the combustion properties of the Al wires efficiently, and (d) the shock velocity can be enhanced using a metal reflector placed below the array.

1.
A. W.
DeSilva
and
J. D.
Katsouros
,
Phys. Rev. E
59
,
3774
(
1999
).
2.
Ya. E.
Krasik
,
S.
Efimov
,
D.
Sheftman
,
A.
Fedotov-Gefen
,
O.
Antonov
,
D.
Shafer
,
D.
Yanuka
,
M.
Nitishinskiy
,
M.
Kozlov
,
L.
Gilburd
,
G.
Toker
,
S.
Gleizer
,
E.
Zvulun
,
V. Tz.
Gurovich
,
D.
Varentsov
, and
M.
Rodionova
,
IEEE Trans. Plasma Sci.
44
,
412
(
2016
) and references therein.
3.
V. E.
Fortov
and
I. T.
Iakubov
,
The Physics of Non-Ideal Plasma
(
World Scientific
,
Singapore
,
2000
).
4.
A. W.
DeSilva
and
H.-J.
Kunz
,
Phys. Rev. E
49
,
4448
(
1994
).
5.
J.
Stephens
,
J.
Dickens
, and
A.
Neuber
,
Phys. Rev. E
89
,
053102
(
2014
).
6.
S. P.
Lyon
and
J. D.
Johnson
, “
SESAME: The Los Alamos National Laboratory equation-of-state database
,”
Report No. LA-UR-92–3407
(Los Alamos National Laboratory,
1992
).
7.
A.
Rososhek
,
S.
Efimov
,
A.
Goldman
,
S. V.
Tewari
, and
Ya. E.
Krasik
,
Phys. Plasmas
26
,
053510
(
2019
).
8.
A.
Rososhek
,
S.
Efimov
,
V.
Gurovich
,
A.
Virozub
,
S. V.
Tewari
, and
Ya. E.
Krasik
,
Phys. Plasmas
26
,
042302
(
2019
).
9.
A.
Rososhek
,
S.
Efimov
,
S. V.
Tewari
,
D.
Yanuka
, and
Ya. E.
Krasik
,
Phys. Plasmas
25
,
102709
(
2018
).
10.
D.
Yanuka
,
A.
Rososhek
,
S. N.
Bland
, and
Ya. E.
Krasik
,
Appl. Phys. Lett.
111
,
214103
(
2017
).
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