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

Now showing items 22-28 of 270

    • 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]. ...
    • Vortex Induced Vibration Analysis of a Cantilevered Hydrofoil by Laser Vibrometry and TR-PIV 
      Communication avec acte
      LEROY, Laure; ccBOT, Patrick (X. Amandolese & P. Hémon, 2020-05)
      The structural response of a steel cantilevered hydrofoil is analyzed through an experiment carried out in a hydrodynamic tunnel for Reynolds numbers ranging from 2 105 to 8:25 105. The hydrofoil is set at a 17 angle to ...