Papers by Jean-marc Laurens
Numerical Prediction of the Impact Behaviour of Composite Ducted Tidal Turbine
This work presents a numerical study of the impact behaviour of an all composite ducted tidal tur... more This work presents a numerical study of the impact behaviour of an all composite ducted tidal turbine. The numerical analysis has been performed by means of advanced numerical models implemented into Abaqus/Explicit. The modelling procedure in term of intralaminar damage model was implemented using the VUMAT subroutine which has been validated through comparison with experimental data available. A submodeling approach has been used to reduce significantly the computational time. The main objective of the numerical approach presented in this study is to propose a structural design methodology leading to improve the design efficiency and reduce the certifications cost of ducted tidal turbine, keeping in mind a commercial scalability of the MJM concept (Mahrez-Mostapha &Jean-Marc design). The proposed approach reveals some interesting points concerning the severity of the impact damage and the safety of the duct.
To convert the kinetic energy of marine current into electricity, the most sensible generator is ... more To convert the kinetic energy of marine current into electricity, the most sensible generator is a horizontal axis turbine. The know-how and the tools used for marine propulsion devices find a new range of applications in this field. An academic panel method code developed for the design of bare and ducted marine propellers was applied to design a marine current turbine. The turbine dimension and the tidal current velocity have been taken to fit the conditions in the Race of Alderney. The wing section theory and the optimum rotor theory based on the blade element momentum were used to obtain the design condition and a first geometry approaching the Betz limit for a bare rotor. The panel method was then used to verify the power coefficient obtained in the presence of the 3D effects and if the cavitation constraints are respected. Subsequently, the same panel code was used to verify if the addition of a duct could improve the power output per unit surface.
Flow Measurement and Instrumentation, 2015
ABSTRACT
Journal of Fluids and Structures, 2015
The full Navier-Stokes approach to simulate the flow around the propeller and the pod is still ti... more The full Navier-Stokes approach to simulate the flow around the propeller and the pod is still time-consuming despite the most recent progress in available laboratory standard computing capabilities. The mesh generation remains a problem especially around the propeller.
A sheet cavitation module has been developed and applied in a BEM code for calculating propeller ... more A sheet cavitation module has been developed and applied in a BEM code for calculating propeller performance. This simulation, in order to represent the sheet cavitation, employs the transpiration velocities technique which allows the deviation of slip condition points without any modification of the geometry. The method provides a very rapid simulation compared to two-phase Navier-Stokes simulations. The model is
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Papers by Jean-marc Laurens