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Etude des tuyères composites pour une conception optimale d'une hydrolienne à axe horizontal

Abstract : Against the backdrop of the increasing scarcity of non-renewable fossil resources and climate change, the energy problem has become a worldwide issue. Hence, the exploitation of new renewable energy sources becomes a worldwide goal of primary importance. The concept of the underwater turbine, called tidal current turbine, designates the device which allows the conversion of the kinetic energy produced by marine currents in electric energy. This research study examines the problems related to the design of horizontal axis tidal current turbines. The present study shows that the world of marine propellers, sometimes entirely left out by the designers of tidal current turbines, presents an interesting avenue of research with regard to the hydrodynamic behaviour of tidal current turbines. Certain designers of tidal current turbines use a duct and hold that the addition of the duct contributes to the improvement of the hydrodynamic performance. Therefore, the study of the hydrodynamic benefits of ducted turbine using a constant overall cross-section than the bare turbine was the starting point of the present research work. In order to meet the needs of the manufacturers of tidal current turbines, which is generally linked to a problem of mass gain, composite materials present a considerable asset on account of their excellent «mass/resistance» and «mass/rigidity» relations. A structural design of ducted tidal current turbines using composite materials has therefore been examined. Hence, the design of a composite duct which yields the best «power/mass» ratio has been proposed. The duct of the tidal current turbine is especially confronted by the impacts due to its particular position. The impact damage aspect has also been examined in detail in the present research study.
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Submitted on : Tuesday, March 21, 2017 - 10:45:52 PM
Last modification on : Friday, October 23, 2020 - 4:48:01 PM
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  • HAL Id : tel-01493676, version 1

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Mahrez Ait Mohammed. Etude des tuyères composites pour une conception optimale d'une hydrolienne à axe horizontal. Génie mécanique [physics.class-ph]. Université de Bretagne occidentale - Brest, 2017. Français. ⟨NNT : 2017BRES0002⟩. ⟨tel-01493676⟩

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