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Wind tunnel investigation of dynamic trimming on upwind sail aerodynamics

hal.structure.identifierInstitut de Recherche de l'Ecole Navale [IRENAV]
dc.contributor.authorAUBIN, Nicolas
hal.structure.identifierInstitut de Recherche de l'Ecole Navale [IRENAV]
dc.contributor.authorAUGIER, Benoit
hal.structure.identifierInstitut de Recherche de l'Ecole Navale [IRENAV]
dc.contributor.authorSACHER, Matthieu
hal.structure.identifierInstitut de Recherche de l'Ecole Navale [IRENAV]
dc.contributor.authorBOT, Patrick
hal.structure.identifierInstitut de Recherche de l'Ecole Navale [IRENAV]
dc.contributor.authorHAUVILLE, Frédéric
hal.structure.identifierUniversity of Auckland [Auckland]
dc.contributor.authorFLAY, Richard G.J.
dc.date.accessioned2021-05-14T09:49:07Z
dc.date.available2021-05-14T09:49:07Z
dc.date.issued2017
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/77175
dc.description.abstractEnAn experiment was performed in the Yacht Research Unit’s Twisted Flow Wind Tunnel(University of Auckland) to test the effect of dynamic trimming on three IMOCA 60 inspired mainsail models in an upwind ( AW = 60°) unheeled configuration. This study presents dynamic fluid structure interaction results in well controlled conditions (wind, sheet length) with a dynamic trimming system. Trimming oscillations are done around an optimum value of CFobj previously found with a static trim. Different oscillation amplitudes and frequencies of trimming are investigated. Measurementsare done with a 6 component force balance and a load sensor giving access to the unsteady mainsail sheet load. The driving CFx and optimization target CFobj coefficient first decrease at low reduced frequency fr for quasi-steady state then increase, becoming higher than the static state situation. The driving force CFx and the optimization target coefficient CFobj show an optimum for thethree different design sail shapes located at fr = 0.255. This optimum is linked to the power transmitted to the rig and sail system by the trimming device. The effect of the camber of the design shape is also investigated. The flat mainsail design benefits more than the other mainsail designs from the dynamic trimming compared to their respective static situtation. This study presents dynamic results that cannot be accurately predicted with a quasi-static approach. These results are therefore valuable for future FSI numerical tools validations in unsteady conditions.
dc.language.isoen
dc.publisherThe Society of Naval Architects and Marine Engineers
dc.subject.enyacht sails
dc.subject.enwind tunnel
dc.subject.enfluid structure interaction
dc.subject.enunsteady
dc.title.enWind tunnel investigation of dynamic trimming on upwind sail aerodynamics
dc.typeArticle de revue
dc.subject.halSciences de l'ingénieur [physics]/Mécanique [physics.med-ph]/Mécanique des fluides [physics.class-ph]
bordeaux.journalJournal of Sailing Technology
bordeaux.page2010-01
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.peerReviewedoui
hal.identifierhal-01696927
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01696927v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal%20of%20Sailing%20Technology&rft.date=2017&rft.spage=2010-01&rft.epage=2010-01&rft.au=AUBIN,%20Nicolas&AUGIER,%20Benoit&SACHER,%20Matthieu&BOT,%20Patrick&HAUVILLE,%20Fr%C3%A9d%C3%A9ric&rft.genre=article


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