• français
    • English
    français
  • Login
Help
View Item 
  •   Home
  • Institut de Recherche de l’École navale (IRENAV)
  • View Item
  • Home
  • Institut de Recherche de l’École navale (IRENAV)
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Wind tunnel investigation of dynamic trimming on upwind sail aerodynamics

Article dans une revue avec comité de lecture
Author
AUBIN, Nicolas
AUGIER, Benoit
ccBOT, Patrick
13094 Institut de Recherche de l'Ecole Navale [IRENAV]
ccHAUVILLE, Frederic
SACHER, Matthieu
FLAY, Richard G.J.
160272 University of Auckland [Auckland]

URI
http://hdl.handle.net/10985/12560
Date
2017
Journal
Journal of Sailing Technology

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.

Files in this item

Name:
Aubin_et_al_JST_article 1.pdf
Size:
5.244Mb
Format:
PDF
View/Open

Collections

  • Institut de Recherche de l’École navale (IRENAV)

Related items

Showing items related by title, author, creator and subject.

  • Wind tunnel investigation of dynamic trimming on upwind sail aerodynamics 
    Communication avec acte
    AUBIN, Nicolas; AUGIER, Benoit; SACHER, Matthieu; FLAY, Richard G.J.; ccBOT, Patrick; ccHAUVILLE, Frederic (2016)
    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 (AWA = 60 ) unheeled ...
  • Performance enhancement of downwind sails due to leading edge flapping: A wind tunnel investigation 
    Article dans une revue avec comité de lecture
    AUBIN, Nicolas; AUGIER, Benoit; DEPARDAY, Julien; SACHER, Matthieu; ccBOT, Patrick (Elsevier, 2018)
    This work presents a wind tunnel experimental study on the effect of the leading edge flapping on the aerodynamic performance of a spinnaker. Four J80-class spinnaker models, combining two different assembling structures ...
  • Optimising hydrofoils using automated multi-fidelity surrogate models 
    Article dans une revue avec comité de lecture
    ccPEHLIVAN SOLAK, Hayriye; ccWACKERS, Jeroen; PELLEGRINI, Riccardo; SERANI, Andrea; DIEZ, Matteo; PERALI, Paolo; SACHER, Matthieu; LEROUX, Jean-Baptiste; AUGIER, Benoît; ccHAUVILLE, Frederic; ccBOT, Patrick (Informa UK Limited - Taylor & Francis, 2024-11-14)
    Lifting hydrofoils are gaining importance, since they drastically reduce the wetted surface area of a ship, thus decreasing resistance. To attain efficient hydrofoils, the geometries can be obtained from an automated ...
  • Performance prediction of a hydrofoil near the free surface using low (BEM) and high (RANS) fidelity methods 
    Article dans une revue avec comité de lecture
    PERALI, Paolo; SACHER, Matthieu; LEROUX, Jean-Baptiste; ccWACKERS, Jeroen; AUGIER, Benoît; ccHAUVILLE, Frederic; ccBOT, Patrick (Elsevier BV, 2024-08-08)
    As a first step toward a multi-fidelity optimization tool for hydrofoils, the present work assesses the ability of the in-house code PUFFIn to be used as a “low-fidelity” solver within the multi-fidelity framework. The ...
  • How to be the best at sail pumping? 
    Communication avec acte
    AUBIN, Nicolas; DHOME, Ulisse; AUGIER, Benoit; ccBOT, Patrick; ccHAUVILLE, Frederic (2016)
    Pumping or flicking1 is often used by sailors to get extra propulsion while sailing (subject to restrictions by the racing rules2). Common unsteady sailing situations, due to crew action (e.g. manoeuver like gybing3) or ...

Browse

All SAMCommunities & CollectionsAuthorsIssue DateCenter / InstitutionThis CollectionAuthorsIssue DateCenter / Institution

Newsletter

Latest newsletterPrevious newsletters

Statistics

Most Popular ItemsStatistics by CountryMost Popular Authors

ÉCOLE NATIONALE SUPERIEURE D'ARTS ET METIERS

  • Contact
  • Mentions légales

ÉCOLE NATIONALE SUPERIEURE D'ARTS ET METIERS

  • Contact
  • Mentions légales