Wind tunnel investigation of dynamic trimming on upwind sail aerodynamics

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dc.contributor.author AUBIN, Nicolas
ensam.hal.laboratories
  13094 Institut de Recherche de l'Ecole Navale (EA 3634) [IRENAV]
dc.contributor.author AUGIER, Benoit
ensam.hal.laboratories
  13094 Institut de Recherche de l'Ecole Navale (EA 3634) [IRENAV]
dc.contributor.author SACHER, Matthieu
ensam.hal.laboratories
  13094 Institut de Recherche de l'Ecole Navale (EA 3634) [IRENAV]
dc.contributor.author BOT, Patrick
ensam.hal.laboratories
  13094 Institut de Recherche de l'Ecole Navale (EA 3634) [IRENAV]
dc.contributor.author HAUVILLE, Frédéric
ensam.hal.laboratories
  13094 Institut de Recherche de l'Ecole Navale (EA 3634) [IRENAV]
dc.contributor.author FLAY, Richard G.J.
ensam.hal.laboratories
  160272 University of Auckland [Auckland]
dc.date.accessioned 2018-01-30T15:11:05Z
dc.date.available 2018-01-30T15:11:05Z
dc.date.issued 2017
dc.date.submitted 2017-09-06T12:36:21Z
dc.identifier.issn 2475-370X
dc.identifier.uri http://hdl.handle.net/10985/12560
dc.description.abstract An 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. Measurements
are 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 the
three 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.
en
dc.language.iso en
dc.publisher SNAME
dc.rights Post-print
dc.subject yacht sails en
dc.subject wind tunnel en
dc.subject fluid structure interaction en
dc.subject unsteady en
dc.title Wind tunnel investigation of dynamic trimming on upwind sail aerodynamics en
ensam.hal.id hal-01696927 *
ensam.hal.status accept *
dc.typdoc Articles dans des revues avec comité de lecture
dc.localisation Centre de Paris
dc.subject.hal Sciences de l'ingénieur: Mécanique: Mécanique des fluides
ensam.audience Internationale
ensam.page 2010-01
ensam.journal Journal of Sailing Technology
ensam.peerReviewing Oui

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