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Mitigation of underwater explosion effects by bubble curtains : experiments and modelling

hal.structure.identifierLaboratoire brestois de mécanique et des systèmes [LBMS]
dc.contributor.authorCROCI, Kilian
hal.structure.identifierLaboratoire brestois de mécanique et des systèmes [LBMS]
dc.contributor.authorARRIGONI, Michel
hal.structure.identifierDépartement Gassendi [DG]
hal.structure.identifierDGA Techniques Navales
dc.contributor.authorBOYCE, P.
hal.structure.identifierInstitut de Recherche de l'Ecole Navale [IRENAV]
dc.contributor.authorGABILLET, Céline
hal.structure.identifierDGA Tech. Navales
dc.contributor.authorGRANDJEAN, H.
hal.structure.identifierLaboratoire brestois de mécanique et des systèmes [LBMS]
dc.contributor.authorJACQUES, Nicolas
hal.structure.identifierLaboratoire brestois de mécanique et des systèmes [LBMS]
dc.contributor.authorKERAMPRAN, Steven
dc.date.accessioned2021-05-14T09:59:28Z
dc.date.available2021-05-14T09:59:28Z
dc.date.issued2014-09
dc.date.conference2014-09-12
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/78048
dc.description.abstractEnMine fields and UneXploded Ordnances (UXO) become a danger regarding maritime activities. Since UXOs are strongly affected by marine corrosion after decades, they cannot be handled safely. A safe solution to get rid of them would be to explode them in their locations. However, this method generates noise pollution and damaging shock waves. Mitigation of shocks and noises is made possible by the use of a bubble curtain set around the explosive charge. Physical aspects of shock propagation in bubbly flows have been the subject of numerous investigations in the past decades and theoretical models of aerated liquids now reproduce main shock features with acceptable accuracy in the case of a uniform distribution of bubbles of the same size. However, the bubble distribution obtained by air blown in a porous pipe is far to be monodisperse. So the modeling of the interaction of a shock wave with a polydisperse medium still remains a challenge. In the present study, the transmission of a shock wave propagating through a bubble curtain is investigated experimentally on a water filled tank. A microporous pipe, connected to a compressed air supply system and a flowmeter, is placed on the floor in the tank. A dual-tip fiber optical probe is used to measure the gas fraction distribution, bubble rising velocity and bubble size distribution in the curtain. A calibrated shock wave is generated by plate impact, upstream of the bubble curtain, and recorded downstream with a hydrophone. The mitigation of the pressure peak by the bubbly medium is evidenced by recorded pressure signals with and without bubble curtain. Experimental gas fraction profiles and bubble size distributions, measured in the bubble curtains, are finally used as input parameters in the numerical model developed by Grandjean et al. (2011). This numerical model enables prediction of shock wave mitigation and allows calibrating a suitable bubble curtain.
dc.language.isoen
dc.source.titleProceedings of the 23rd MABS
dc.title.enMitigation of underwater explosion effects by bubble curtains : experiments and modelling
dc.typeCommunication dans un congrès avec actes
dc.subject.halPhysique [physics]/Physique [physics]/Dynamique des Fluides [physics.flu-dyn]
dc.subject.halSciences de l'ingénieur [physics]/Mécanique [physics.med-ph]/Mécanique des fluides [physics.class-ph]
dc.subject.halPhysique [physics]/Mécanique [physics]/Mécanique des fluides [physics.class-ph]
bordeaux.page14 p
bordeaux.hal.laboratoriesInstitut de Mécanique et d’Ingénierie de Bordeaux (I2M) - UMR 5295*
bordeaux.institutionUniversité de Bordeaux
bordeaux.institutionBordeaux INP
bordeaux.institutionCNRS
bordeaux.institutionINRAE
bordeaux.institutionArts et Métiers
bordeaux.countryGB
bordeaux.title.proceeding23rd MABS (Military Aspects of Blast and Shock), Oxford, UK, 7-12 September 2014
bordeaux.peerReviewedoui
hal.identifierhal-01071652
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01071652v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.btitle=Proceedings%20of%20the%2023rd%20MABS&rft.date=2014-09&rft.spage=14%20p&rft.epage=14%20p&rft.au=CROCI,%20Kilian&ARRIGONI,%20Michel&BOYCE,%20P.&GABILLET,%20C%C3%A9line&GRANDJEAN,%20H.&rft.genre=proceeding


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