%0 Journal Article %T Efficient jib-mainsail fluid-structure interaction modelling – Validations with semi-rigid sails experiments %+ Institut de Recherche Dupuy de Lôme (IRDL) %+ Chantiers de l'Atlantique %A Morvan, Antoine %A Sacher, Matthieu %A Nême, Alain %A Leroux, Jean-Baptiste %A Jochum, Christian %A Abiven, Nicolas %< avec comité de lecture %@ 0029-8018 %J Ocean Engineering %I Elsevier %V 243 %P 110210 %8 2022-01 %D 2022 %R 10.1016/j.oceaneng.2021.110210 %K Navier Stokes equations %K Ships %K Vortex flow %Z Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph]Journal articles %X he present work takes place in the framework of the “Jib Sea” project. The main purpose of the project is to develop a new sail design made of articulated composite panels, for large merchant ships. The French laboratory “ENSTA Bretagne, IRDL” is involved in this industrial project for its expertise on fluid-structure interactions modelling. A fast and robust approach to model fluid-structure interactions for yacht sails is presented. Specifically, interaction effects between the jib and the mainsail are considered in the flow model presented. This is achieved using the lifting-line theory combined with a discrete vortex method, involving distributions of lumped-vortex elements along sail sections. The flow model is coupled with a finite element analysis of the structure, using shell elements for the modelling of sail membranes, beam stringers for battens modelling and a quasi-static resolution based on a dynamic backward Euler scheme. The flow model based on the Lifting-Line Theory is presently validated by a commercial software tools using the Unsteady Reynolds-Average Navier-Stokes equations. Numerical comparisons with experiments are conducted on a 50 m2 composite mainsail prototype and a conventional jib, built and hoisted on an onshore balestron rig. Measurements, such as strain gauges or cable tensions, are synchronized with a wind sensor. These data collected together enable both global and local numerical-experimental comparisons for forces and moments, providing a validation of the proposed fluid-structure interactions modelling of ship sails. A good match between experimental and numerical modelling is observed on local comparisons as relative differences are all less than 25% for TWA∈[−20;20] and TWS<10 kn. Global comparison results exhibit validations with experiments for |TWA|<10 deg and TWS<10 kn, where numerical-experimental relative differences are less than 10%. %G English %2 https://ensta-bretagne.hal.science/hal-03467731/document %2 https://ensta-bretagne.hal.science/hal-03467731/file/HPYD7_MORVAN_et_AL_VERSION_AUTEUR.pdf %L hal-03467731 %U https://ensta-bretagne.hal.science/hal-03467731 %~ UNIV-BREST %~ ENSTA-BRETAGNE %~ CNRS %~ UNIV-UBS %~ UBS %~ ENIB %~ IRDL %~ ENSTA-BRETAGNE-MECA %~ TEST-HALCNRS %~ ENSTA-BRETAGNE-PTR3-IRDL