Institut de Recherche de l’École navale (IRENAV): Recent submissions

Now showing items 22-28 of 270

    • Système de propulsion ou de positionnement dynamique cycloidal pour un navire 
      Brevet
      DAMAY, Thomas; ccHAUVILLE, Frederic (INPI, 2019-01)
      L'invention concerne un système de propulsion ou de positionnement dynamique cycloïdal pour un navire baignant dans une eau présentant une direction d'écoulement et comportant un châssis, un rotor montè mobile en rotation ...
    • On the Effect of the Leading-Edge Separation Bubble on the Aerodynamics of Spinnakers 
      Communication avec acte
      SOUPPEZ, Jean-Baptiste R.G.; VIOLA, Ignazio Maria; ccBOT, Patrick (RINA NZ, 2021-03)
      The spinnaker is the most powerful and one of the most used sails both in racing and cruising - yet its complex aerodynamics governed by flow separation is still not fully understood. While the flow around a spinnaker is ...
    • Cycloidal Dynamic Propulsion or Positioning System For a Ship 
      Brevet
      DAMAY, Thomas; ccHAUVILLE, Frederic (Patent Application Publication, 2022-03-03)
      A cycloidal dynamic propulsion or positioning system for a ship in water that exhibits a direction of flow, including a frame, a rotor mounted to be movable in rotation on the frame about a main axis at right angles to the ...
    • A Non-Nested Infilling Strategy for Multi-Fidelity based Efficient Global Optimization 
      Article dans une revue avec comité de lecture
      SACHER, Matthieu; LE MAITRE, Olivier; DUVIGNEAU, Régis; DURAND, Mathieu; LOTHODE, Corentin; ccHAUVILLE, Frederic (Begell, 2021)
      Efficient global optimization (EGO) has become a standard approach for the global optimization of complex systems with high computational costs. EGO uses a training set of objective function values computed at selected ...
    • An experimental blade-controlled platform for the design of smart cross-flow propeller 
      Article dans une revue avec comité de lecture
      FASSE, Guillaume; BECKER, Florent; ccHAUVILLE, Frederic; GERMAIN, Grégory (Elsevier BV, 2022-04)
      As an academic platform, the French Naval Academy Research Institute (IRENav) developed a large-scale experimental cycloidal propeller (800 kg, 0.4 m radius) with the aim of running diverse pitch motions to evaluate ...
    • 6DOF behavior of an offshore racing trimaran in an unsteady environment 
      Communication avec acte
      KERDRAON, Paul; HOREL, Boris; LETOURNEUR, Adrien; LE TOUZÉ, David; ccBOT, Patrick (SNAME, 2019-03)
      While in recent years the use of hydrofoils has experienced a substantial growth, traditional design tools such as Velocity Prediction Programs (VPP) have proven inadequate to help architects and engineers with performance ...
    • Surrogates and Classification approaches for Efficient Global Optimization (EGO) with Inequality Constraints 
      Communication avec acte
      SACHER, Matthieu; DUVIGNEAU, Régis; LE MAITRE, Olivier; DURAND, Mathieu; BERRINI, Elisa; ccHAUVILLE, Frederic (2017-05)
      In this work, we compare the use of Gaussian Process (GP) models for the constraints [Schonlau 1997] with a classification approach relying on a Least-Squares Support Vector Machine (LS-SVM) [Suykens and Vandewalle 1999]. ...