Title :
Micro- and nanosecond time scale, high power electrical wire explosion in water
Author :
Krasik, Ya E. ; Grinenko, A. ; Efimov, S. ; Fedotov, A. ; Gurovich, V. Tz ; Oreshkin, V.I.
Author_Institution :
Dept. of Phys., Technion-Israel Inst. of Technol., Haifa
Abstract :
Summary form only given. Experimental and magneto-hydro-dynamic simulation results of micro- and nanosecond time scale underwater electrical Al, Cu and W wire explosions are presented. A capacitor bank with stored energy up to 6 kJ (discharge current up to 80 kA with 2.5 mus quarter period) was used in microsecond time scale experiments and water forming line generator with current amplitude up to 100 kA and pulse duration of 100 ns were used in nanosecond time scale experiments. Extremely high energy deposition of up to 60 times the atomization enthalpy was registered in nanosecond time scale explosions. A discharge channel evolution and surface temperature were analyzed by streak shadow imaging and using fast photo-diode with a set of interference filters, respectively. Microsecond time scale electrical explosion of cylindrical wire array showed extremely high pressure of converging shock waves at the axis, up to 0.2 Mbar. A 1D and 2D magneto-hydro-dynamic simulation demonstrated good agreement with such experimental parameters as discharge channel current, voltage, radius, and temperature
Keywords :
aluminium; copper; discharges (electric); exploding wires; explosions; plasma diagnostics; plasma magnetohydrodynamics; plasma shock waves; plasma simulation; plasma temperature; tungsten; 0.2 Mbar; 100 kA; 100 ns; 2.5 mus; 6 kJ; 80 kA; Al; Cu; W; atomization enthalpy; capacitor bank; converging shock waves; cylindrical wire array; discharge channel evolution; energy deposition; fast photodiode; interference filters; magnetohydrodynamic simulation; streak shadow imaging; surface temperature; underwater electrical wire explosions; water forming line generator; Atomic layer deposition; Capacitors; Explosions; Image analysis; Magnetic separation; Pulse generation; Surface discharges; Temperature; Water storage; Wire;
Conference_Titel :
Plasma Science, 2006. ICOPS 2006. IEEE Conference Record - Abstracts. The 33rd IEEE International Conference on
Conference_Location :
Traverse City, MI
Print_ISBN :
1-4244-0125-9
DOI :
10.1109/PLASMA.2006.1706917
