title: Experimental characterization of plasma formation and shockwave propagation induced by high power pulsed underwater electrical discharge.
abstract: High power pulsed electrical discharges into liquids are investigated for new industrial applications based on the efficiency of controlled shock waves. We present here new experimental data obtained by combination of detailed high speed imaging equipments. It allows the visualization of the very first instants of plasma discharge formation, and then the pulsations of the gaseous bubble with an accurate timing of events. The time history of the expansion/compression of this bubble leads to an estimation of the energy effectively transferred to water during the discharge. Finally, the consecutive shock generation driven by this pulsating bubble is optically monitored by shadowgraphs and schlieren setup. These data provide essential information about the geometrical pattern and chronometry associated with the shock wave generation and propagation.
authors.affiliation: Institut Pprime (CNRS, UPR 3346, Université de Poitiers, ENSMA), Bld Marie et Pierre Curie, Téléport 2, BP 30179F, 86962 Futuroscope, France.
authors.forename: A
authors.initials: A
authors.lastname: Claverie
authors.affiliation: Bmax, 30 Bld de Thibaud, 31100 Toulouse, France.
authors.forename: J
authors.initials: J
authors.lastname: Deroy
authors.affiliation: Institut Pprime (CNRS, UPR 3346, Université de Poitiers, ENSMA), Bld Marie et Pierre Curie, Téléport 2, BP 30179F, 86962 Futuroscope, France.
authors.forename: M
authors.initials: M
authors.lastname: Boustie
authors.affiliation: Bmax, 30 Bld de Thibaud, 31100 Toulouse, France.
authors.forename: G
authors.initials: G
authors.lastname: Avrillaud
authors.affiliation: LPP, Ecole Polytechnique, 91128 Palaiseau, France.
authors.forename: A
authors.initials: A
authors.lastname: Chuvatin
authors.affiliation: Institut Pprime (CNRS, UPR 3346, Université de Poitiers, ENSMA), Bld Marie et Pierre Curie, Téléport 2, BP 30179F, 86962 Futuroscope, France.
authors.forename: E
authors.initials: E
authors.lastname: Mazanchenko
authors.affiliation: ITHPP, Hameau de Drèle, 46500 Thégra, France.
authors.forename: G
authors.initials: G
authors.lastname: Demol
authors.affiliation: ITHPP, Hameau de Drèle, 46500 Thégra, France.
authors.forename: B
authors.initials: B
authors.lastname: Dramane