16/10/18 titre présentation 1

Effetsdepressiongénéréedansl'eaupardéchargesélectriquesouirradia6onlaserpulsée

JulienDeroy,AlainClaverie,MichelBous6e,EkaterinaMazanchenko,MichelArrigoni

Ingénierie Electrotechnique Systèmes de Fortes Puissances

14émesJournéesd’EchangesduRéseaudesPlasmasFroids

15-18octobreLaRochelle

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Plan

•  Contexte•  Méthodologie•  Déchargedansl’eau•  Simus•  Laser•  CavitaFon•  ConclusionsetperspecFves

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IntroducFon

Highpowerelectricaldischargeinwater:

•  generaFonofshockwaves,•  waves propagaFon and interacFon with

materials.

ApplicaFons:

•  medical,•  separaFonofmaterials,•  recycling.

Fig.fromPhDthesisofGillesTouya

Lithotripterandfragmentsofa1-cmcalciumoxalatestone

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ProblemdefiniFon

Concept

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ExamplesoffragmentaFon,ITHPP

Beforetreatment AUertreatment 5

Procedure

Experimentaltests Data SimulaFon OpFmisaFon

•  ITHPPgenerator(I(t),Δxelectrodes);•  diagnosFcs

Objectives Moyens expérimentaux

Caracterisation du terme source Visus, strio, emission spectra

Waves propagation Visus

Interaction with objet / Fragmentation Visus + inverse measurements

AltairRADIOSS

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SchemaFcofexperimentalsetupforhighpowerpulsedunderwaterelectricaldischarge

A.Claverie,J.Deroy,M.Bous6e,G.Avrillaud,A.Chuva6n,E.Mazanchenko,G.Demol,B.Dramane.Experimentalcharacteriza6onofplasmaforma6onandshockwavepropaga6oninducedbyhighpowerpulsedunderwaterelectricaldischarge//ReviewofScien6ficInstruments.85,063701(2014).

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Experimentalsetup,Bmax• Modularelectricaldischargegenerator:

•  CapaciFvestorageofelectricalenergy•  1to9capacitorsof1.85µF,maximumvoltageof40kV•  Storedenergycapability:approx.1-10kJ

•  Dischargecircuit:•  Point-PointorPoint-PlaneelectrodesconfiguraFon•  Variableinterelectrodesgap

•  AvailablediagnosFcs:•  Currentandvoltageprobes•  Pressuregauge•  Highspeedcameras•  Velocimetrymeasurement

8 J.Deroyandall.Op6caldiagnos6csforpulsedunderwaterelectricaldischargecharacteriza6on//2013APS-SCCM/AIRAPTJOINTCONFERENCE(7-12July,Sea\le).

VisualizaFonoftheplasmathroughdischargechannel

t=12ns t=1µs t=2.1µs t=2.7µs

t=5µs t=9.1µs t=10µs t=30µs

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A.Claverie,J.Deroy,M.Bous6e,G.Avrillaud,A.Chuva6n,E.Mazanchenko,G.Demol,B.Dramane.Experimentalcharacteriza6onofplasmaforma6onandshockwavepropaga6oninducedbyhighpowerpulsedunderwaterelectricaldischarge//ReviewofScien6ficInstruments.85,063701(2014).

Typicalemissionspectrafromhighpowerunderwaterelectricaldischarge

10

0

15000

30000

45000

60000

180 280 380 480 580 680 780 880 980

Inte

nsity

(AU

)

Wavelength (nm)

OH

Hγ Hβ

obtained with trigger on discharge instant and 100 μs after discharge

0

5000

10000

15000

20000

180 280 380 480 580 680 780 880 980

Inte

nsity

(AU

) Wavelength (nm)

Bubbleexpansion,ITHPP

Gap15mmU0=25kVC=1.85µFE0=327JPressurediagnosFc-PVDF

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DirectobservaFon-Bubbleexpansion

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Measureddepositedelectricalenergy:111.6J(total),75.7J(1st“arch”ofpowerdeposiFon)EsFmateddepositedelectricalenergyfrompotenFalenergyatr=Rmax:67.9J

PressurewavepropagaFonobservaFon

UltraHighSpeedCamera(byLCD):ShimadzuHPV-2cameraupto1Mframes/s(312x260pixels)

Spherical mirror

Hg lamp

Spherical lens

Knife

Spherical lens

Highspeedcamera

Experimentation tank

Filter

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RADIOSSNumericalsimulaFonhasbeenprovidedwithAltairHyperWorksproducts:HyperMesh,HyperCrashandRADIOSScode.

RADIOSS:

•  FiniteElementSolver,•  linearandnon-linearsimulaFons(structures,fluids,fluid-structureinteracFon,

mechanicalsystemsetc.),•  high-speedimpactsimulaFon–over20years,•  easytransiFontoOpFStructandHyperStudy.

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Procedure

Experimentaltests Data SimulaFon OpFmisaFon

•  ITHPPgenerator(I(t),Δxelectrodes);•  diagnosFcs AltairRADIOSS

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Experimenttosimulate

Testswerecarriedoutatthetank60x60x53cm(LxWxH).Gapbetweenelectrodes:5to15mm.Maxstoredenergy-to35kJ.Time(shockriseFme):530ns.

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RADIOSSmodeldefiniFon

•  2Daxisymmetric•  QUADelements0.5x0.5mm

•  Gapis15mm,•  depositedenergy327J

SESAMElawpresentaFon 17

EvoluFonofthebubble

0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.50

5

10

15

20

25

0

50

100

150

200

250

300

radius(mm)

Time(ms)

Radius(m

m)

Velocity(m

/s)

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PressurewavepropagaFon

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InteracFonwithaluminiumfoil

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OpFmizaFon:reflector

PossiblemechanicalamplificaFonofshockwaves–anellipsoidalreflector.

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IndirectvelocimetrycalibraFonofpressuregage

0,000

0,002

0,004

0,006

0,008

0,010

0,012

0,014

0,016

0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 11000 12000ns

km/s

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TransiFonverslaser

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Shockwavesgeneratedbylaser,PPRIME

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VelocityInterferometerSystemforAnyReflector(VISAR)

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•  velociFes:from100m/sto10km/s•  transversalvisualisaFons

ShockcalibraFon

ExperimentaldataandsimulaFonoflaser/aluinteracFon

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PressuresimulaFonbyinverseanalysis

2Dmodelwithhydrowaterlawandalu50mum:pressurevariedtofeetexperimentalvelocityprofile,andtheniniFalenergyE0.

0,000

0,002

0,004

0,006

0,008

0,010

0,012

0,014

0,016

0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 11000 12000ns

km/s

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Bubble pictures

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Bubble pictures

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ConclusionsandperspecFves

•  OriginalityofvisualisaFonoffirstdischargephases;•  SimulaFonlimits;•  TheBmaxmodel;•  Progressionmisenœuvredemethode;•  Spectroscopytoextend.

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çamarchemaisonnesaitpasencoretroppourquoi!:)

Annexes

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Ingénierie Electrotechnique Systèmes de Fortes Puissances

InternaFonalTechnologiesforHighPulsedPower,Thegra:RealizaFonoftheprototypesforclientstestsinresearchanddefence.

Bmax(I-Cuberesearch),Toulouse:ExperFseandresearchinforming,weldingandcrimpingusingextremedeformaFonspeeds.

AIDERproject:«ApplicaFonIndustriellesdesDéchargesdansl’EaupourleRecyclage»

PPRIMEInsFtute(CNRS-ENSMA),PoiFers:LMPM+LCD

PAPRECGroupe,LaCourneuve:IndependentFrenchspecialistinrecycling(papers,cartons,confidenFalarchives,plasFc,industrialgarbage,metals,wood,bayeries,vehiclesetc.)

Differentwaystoloadenergy,EMAMulF-physics

∫ =s

EvSdtEµ20

00

30 , mmmJE

Liquidwater/watervaporindischargezone

0

50

100

150

200

250

300

350

000E+0 5E-6 10E-6 15E-6 20E-6

Time, sec

Energy, J

Realenergyprofile33

PressureevoluFonsfordifferentloadingsofenergy1)Energyloadinginthewater 2)Temperatureloadingat

boundaryelements3)Time-dependedenergyatboundaryelements

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0

0,05

0,1

0,15

0,2

0,25

0,3

0,35

0,4

0 0,01 0,02 0,03 0,04 0,05 0,06 0,07 0,08 0,09 0,1

km/s

GPa

alu w a w a mirror contact w a 90 mm w a just before

Pressurenearcontactzone

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36/16

Modeling 2D case

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DemonstratorITHPP

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