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Communication Dans Un Congrès Année : 2014

Optical Diagnostics For High Power Pulsed Underwater Electrical Discharge Characterization

Julien Deroy
  • Fonction : Auteur
Alain Claverie
Gilles Avrillaud
  • Fonction : Auteur
Michel Boustié
David Assous
  • Fonction : Auteur

Résumé

In order to evaluate the behavior of a high power pulsed underwater electrical discharge, and especially characterize the pressure generated by such a discharge, we implemented several optical diagnostics. We first observed directly the expansion of the plasma produced by the dielectric breakdown of the water between the electrodes and the resulting gaseous pulsating bubble. This observation led to an estimate of the pressure inside the bubble with respect to time. We then visualized the propagation of the pressure wave generated by the discharge with shadowgraphy and Schlieren set-up. The obtained velocity was then used to evaluate the theoretical maximum pressure at the pressure front. Finally, we measured the velocity induced by the pressure wave on a thin aluminum disk with a heterodyne velocimeter and used numerical simulation to obtain a temporal form of pressure. These methods and results can be used to develop and assess performances of processes using underwater electrical discharges to generate pressure waves such as electrohydraulic forming. commincation orale abstract dans Bulletin of the American Physical Society, vol 58, num 7, Y3.00002

Dates et versions

hal-02892107 , version 1 (07-07-2020)

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Citer

Julien Deroy, Alain Claverie, Gilles Avrillaud, Michel Boustié, Ekaterina Mazanchenko, et al.. Optical Diagnostics For High Power Pulsed Underwater Electrical Discharge Characterization. 18th Biennial Intl. Conference of the APS Topical Group on Shock Compression of Condensed Matter held in conjunction with the 24th Biennial Intl. Conference of the Intl. Association for the Advancement of High Pressure Science and Technology (18th APS-SSCM and 24th AIRAPT), Jul 2013, Seattle, Washington, United States. pp.142010, ⟨10.1088/1742-6596/500/14/142010⟩. ⟨hal-02892107⟩
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