Consulta: subjectFacets:"Hydrolienne"
Registros recuperados: 5
Data/hora: 01/06/2024 08:47:23

Durabilité des composites pour énergie marine renouvelable
Provedor de dados: 5
Autores: Davies, Peter; Boisseau, A.; Choqueuse, Dominique; Thiebaud, F.; Perreux, D.
Composites will play an essential role in the development of ocean energy conversion systems, and their long term durability is critical to the success of these structures. Composites have been widely used in marine applications and in structures highly loaded in fatigue such as wind turbine blades. However, very few data are available to evaluate their performance under conditions which combine long term immersion in sea water and sustained cyclic loading. In this study composites reinforced with three different types of glass fibre and the same epoxy resin have been tested under these conditions, and the influence of aging on both static and fatigue behaviour has been quantified. Fibre type, resin and fibre/resin interface all influence the fatigue...
Tipo: Text
Palavras-chave: Fatigue; Eau de mer; Énergie marine; Hydrolienne; Pale; Fatigue; Sea water; Ocean energy; Tidal turbine; Blade.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00480/59161/61790.pdf

Caractérisation expérimentale et numérique du comportement hydrodynamique d’une hydrolienne à membrane ondulante
Provedor de dados: 5
Autores: Trasch, Martin.
The thesis presented in this document deals with the caracterisation of the behaviour of an undulating membrane tidal energy converter. This kind of device uses the flutter instabilities occurring between a semi-rigid pre-strained membrane and a fluid flow in order to convert the sea currents energy. Above a certain critical flow speed, the structure ondulates, thus activating the linear converters fixed on it. In order to study this system, an experimental model is developped and tested in a flume tank. The power conversion system is simulated by hydraulic dampers. The membrane’s dynamics is analysed in many configurations through trajectory and force measurements, and leads to a parametric study. More realistic flow conditions are also studied, such as...
Tipo: Text
Palavras-chave: Énergies marines renouvelables; Hydrolienne; Interaction fluidestructure; Instabilité de flottement; Essais expérimentaux; Particle Image Velocimetry; Modélisation numérique; Méthode vortex; Éléments finis; Corotationnel; Houle; Effet d’échelle; Marine renewable energy; Tidal energy converter; Power takeoff; Fluid-structure interaction; Flutter instability; Experimental trial; Particle Image Velocimetry; Numerical model; Vortex method; Corotational finite elements; Surface wave; Scale effect.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00490/60185/63527.pdf

Simulation du comportement d’hydroliennes : modélisation de l’influence de la turbulence ambiante et des effets d’interaction
Provedor de dados: 5
Autores: Carlier, Clement.
The development of marine current turbines arrays has been an active research topic for some years. However, many studies are still necessary in order to fully understand the behaviour of such arrays. One of these studies is the impact of the ambient turbulence on the behaviour of marine current turbines. Indeed recent studies have shown that ambient turbulence intensity highly modifies the behaviour of horizontal axis marine current turbines. Consequently numerical simulations have to represent the ambient turbulence or at least its effects on the performance and wake of the turbines. An other one of these studies is the assessment of interaction effect between turbines in close proximity. In order to highlight these interaction effects, experiments were...
Tipo: Text
Palavras-chave: Simulation numérique; Hydrolienne; Turbulence ambiante; Synthetic-Eddy-Method; Hydroliennes en interaction; Essais expérimentaux; Sillage; Performance.; Numerical computations; Marine current turbine; Ambiant turbulence; Synthetic-Eddy- Method; Interacting turbines; Experimental trials; Wake; Performence.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00478/58926/61496.pdf

Étude expérimentale des performances d’une hydrolienne, soumise aux effets de la turbulence et de l’interaction houle-courant
Provedor de dados: 5
Autores: Gaurier, Benoit.
In the context of global warming, the extraction of energy by tidal turbines from marine currents must be integrated into the future energetic mix. Being confronted with a difficult marine environment, it is required to know the turbines’ behaviour when they are submitted to realistic solicitations to guarantee an optimal use. In this work, the marine turbine performance is studied when the machine is submitted to a turbulent current or a combined wave-current effect. The physical representation of trials at reduced scale is first described focusing on the incoming flow characterisation and its effects on a turbine model at 1:20 scale. The location and measurement type of the upstream velocity are discussed to accurately define its performance and its...
Tipo: Text
Palavras-chave: Hydrolienne; Énergie marine renouvelable; Essais expérimentaux; PIV; LDV; Turbulence; Interaction houle-courant; Horizontal axis tidal turbine; Renewable energy; Experimental trials; PIV; LDV; Turbulence; Wave-current interaction.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00660/77197/78624.pdf

Caractérisation numérique et expérimentale des effets d'interaction entre une hydrolienne et le milieu marin
Provedor de dados: 5
Autores: Maganga, Fabrice.
This work aims to characterise by the means of expérimental and numerical modeling, the behavior of marine current turbine and the characteristics of the wake generated under realistic inflow conditions. For that purpose, we used a tri-bladed horizontal axis turbine of 0.7 m of diameter. Particular attention is paid to the flow characteristic effects on the efficiency of the turbine, but also on the generated wake. Tests are carried out in the Ifremer wave and current flume tank in Boulogne-sur-Mer and in the towing tank of Brest, taking into account current profils, upstream turbulence intensity level and disturbances generated by wave/current interaction. The development of a three-dimensional software based on vortex methods, taking into account the non...
Tipo: Text
Palavras-chave: Hydrodynamique; Essais expérimentaux; Méthodes Vortex; Hydrolienne; Sillage.; Hydrodynamic; Experimental trials; Vortex Methods; Marine Current Turbine; Wake.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00170/28153/26384.pdf