Show simple item record

Modal Analysis of Pressures on a Full-Scale Spinnaker

hal.structure.identifierInstitut de Recherche de l'Ecole Navale [IRENAV]
dc.contributor.authorDEPARDAY, Julien
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.identifierInstitut de Recherche de l'Ecole Navale [IRENAV]
dc.contributor.authorAUGIER, Benoît
hal.structure.identifierFluides, automatique, systèmes thermiques [FAST]
dc.contributor.authorRABAUD, Marc
hal.structure.identifierUniversity of Auckland [Auckland]
dc.contributor.authorMOTTA, Dario
hal.structure.identifierUniversity of Auckland [Auckland]
dc.contributor.authorLE PELLEY, David
dc.date.accessioned2021-05-14T09:50:34Z
dc.date.available2021-05-14T09:50:34Z
dc.date.issued2017
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/77296
dc.description.abstractEnWhile sailing offwind, the trimmer typically adjusts the downwind sail " on the verge of luff-ing " , occasionally letting the luff of the sail flap. Due to the unsteadiness of the spinnaker itself, maintaining the luff on the verge of luffing requires continual adjustments. The propulsive force generated by the offwind sail depends on this trimming and is highly fluctuating. During a flapping sequence, the aerodynamic load can fluctuate by 50% of the average load. On a J/80 class yacht, we simultaneously measured time-resolved pressures on the spinnaker, aerodynamic loads, boat data and wind data. Significant spatio-temporal patterns were detected in the pressure distribution. In this paper we present averages and main fluctuations of pressure distributions and of load coefficients for different apparent wind angles as well as a refined analysis of pressure fluctuations, using the Proper Orthogonal Decomposition (POD) method. POD shows that pressure fluctuations due to luffing of the spinnaker can be well represented by only one proper mode related to a unique spatial pressure pattern and a dynamic behavior evolving with the Apparent Wind Angles. The time evolution of this proper mode is highly correlated with load fluctuations. Moreover, POD can be employed to filter the measured pressures more efficiently than basic filters. The reconstruction using the first few modes makes it possible to restrict the flapping analysis to the most energetic part of the signal and remove insignificant variations and noises. This might be helpful for comparison with other measurements and numerical simulations.
dc.language.isoen
dc.publisherThe Society of Naval Architects and Marine Engineers
dc.subject.enyacht sails
dc.subject.enunsteady
dc.subject.enPOD
dc.subject.enfull scale experiment
dc.subject.eninstrumented boat
dc.subject.enspinnaker
dc.subject.enfluid structure interaction
dc.title.enModal Analysis of Pressures on a Full-Scale Spinnaker
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 - 2011
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-01582953
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01582953v1
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%20-%202011&rft.epage=2010%20-%202011&rft.au=DEPARDAY,%20Julien&BOT,%20Patrick&HAUVILLE,%20Fr%C3%A9d%C3%A9ric&AUGIER,%20Beno%C3%AEt&RABAUD,%20Marc&rft.genre=article


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record