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Nantes, France

École Centrale de Nantes is a renowned French Grande école of engineering, established in 1919 under the name of Institut Polytechnique de l'Ouest.École Centrale de Nantes is one of the Centrale Graduate Schools associated as the Groupe Centrale network with its sister institutions . A member of the TIME network, that enables student exchanges among leading European engineering schools, it is also a founder of the France AEROTECH association of French engineering schools. Wikipedia.

In this paper, wave farms composed of two either surging or heaving wave energy converters are considered. Using a numerical model which takes into account wave interactions, the impact on the absorbed wave power of the separating distance between the two systems and the wave direction is studied. In regular waves, a modified qmod factor is introduced and it is found to be more relevant than the usual q factor for identifying this impact. Then, it is shown that, asymptotically, the alteration of the energy absorption due to wave interaction effects decreases with the square root of the distance. This is a slow decay, which leads to a still significant modification of the wave energy absorption at long distance (up to 15% at a distance of 2000 m). In irregular waves, it is shown that constructive and destructive effects compensate each other, particularly when considering the mean annual power. It leads to a smaller impact of the wave interactions on the absorbed energy and shorter distances (smaller than 10% for distances greater than 400 m). Finally, conclusions on if wave interactions should be taken into account or not when designing a wave farm are drawn in function of the distance. © 2010 Elsevier Ltd. All rights reserved.

Chinesta F.,Ecole Centrale Nantes
Archives of Computational Methods in Engineering | Year: 2013

This paper proposes a first attempt to define a two-scales kinetic theory description of suspensions involving short fibers, nano-fibers or nanotubes. We start revisiting the description of dilute enough suspensions for which microscopic, mesoscopic and macroscopic descriptions are available and all them have been successfully applied for describing the rheology of such suspensions. When the suspensions become too concentrated fiber-fiber interactions cannot be neglected and then classical dilute theories fail for describing the rich microstructure evolution. In the semi-concentrated regime some interaction mechanisms that mimetic the randomizing effect of fiber-fiber interactions were successfully introduced. Finally, when the concentration becomes high enough, richer microstructures can be observed. They involve a diversity of fiber clusters or aggregates with complex kinematics, and different sizes and shapes. These clusters can interact to create larger clusters and also break because the flow induced hydrodynamic forces. In this paper we propose a double-scale kinetic theory model that at the first scale consider the kinematics of the clusters, whose structure itself is described at the finest scale, the one related to the rods constituting the clusters. © 2013 CIMNE, Barcelona, Spain.

Agency: Cordis | Branch: H2020 | Program: RIA | Phase: MG-1.9-2015 | Award Amount: 1.40M | Year: 2016

This research project focuses on several key Direct Energy Deposition (DED) Additive Manufacturing (AM) processes that have great potential to be used as cost-effective and efficient repairing and re-manufacturing processes for aerospace components such as turbine blades and landing gears. This project aims to conduct fundamental research to understand the material integrity through chosen DED AM processes, the accuracy and limitations of these deposition processes, effective defect geometry mapping and generation methods, and automated and hybrid DED and post-deposition machining strategies. This project intends to connect repair and re-manufacturing strategies with design through accurate DED process simulation and novel multi-disciplinary design optimisation (MDO) methods to ultimately reduce the weakness of aerospace component at design stage and prolong their the lifecycles. Both powder-based and wire-based DED systems will be investigated to establish an across-the-board comparative study. The data collected through this comprehensive comparative study will be extremely valuable for the OEMs of this project (i.e. GKN, PWC, and HDI) to understand the pros and cons of these DED systems and will help them to select suitable repair and re-manufacturing strategies. The tests conducted in this research are also extremely beneficial for the SMEs in this project (i.e. Liburdi, AV&R, DPS) to validate their existing repairing systems and techniques.

Agency: Cordis | Branch: FP7 | Program: MC-ITN | Phase: FP7-PEOPLE-2013-ITN | Award Amount: 3.42M | Year: 2013

OceaNET concerns floating offshore wind and wave energy. These two areas are well aligned with the European Energy Strategic Plan and the Horizon 2020 programme.It aims at contributing to develop specific technologies and enabling technologies common to both energy sources. The research activities are structured in a number of research projects, which will provide the opportunity for a set of young researchers to be trained in first class European Research & Development (R&D) institutes, universities and companies active in these areas. This hands-on training will be complemented with a number of short courses on enabling technologies, relevant for farm development, and on associated economic, environmental and societal issues required for their future integration in the market. The training programme will be complemented by secondments in selected industrial companies. OceaNET will be developed in close collaboration with EITs KIC InnoEnergy OTS project. KIC InnoEnergy is a pan-European non-for-profit company, mainly funded by the European Institute for Innovation and Technology (EIT), devoted to enhance the education-research-innovation triangle by developing innovative industrial products. OTS project concerns the development of four innovative products for offshore wind and wave energy farms, namely an environmental monitoring hardware and software package, underwater electrical connectors and associated ROVs, air turbine for oscillating water column (OWC) wave energy converters and an O&M support software package. The integration of floating offshore wind and wave energy in the training and research programmes results from both being in a similar status of development (the first farms are coming up in 2012) and sharing the same enabling technologies, licensing, survivability, O&M issues and stakeholders, requiring well-trained professionals with the same background, which at present is still not well integrated in existing university courses.

Agency: Cordis | Branch: H2020 | Program: RIA | Phase: FoF-05-2014 | Award Amount: 4.92M | Year: 2015

The European manufacturing industry faces new challenges, which are currently not addressed by todays products and systems. Most of the products are still in essence simple in nature, with no capability for adapting to the consumers needs and no integrated methods exist for the holistic acquisition and processing of feedback information emanating from product-services. ICP4Life proposes an integrated, collaborative platform for the design, development and support of product-service systems for SMEs, equipment manufacturers and energy suppliers in order to maximize the impact in the European industry. The proposed platform comprises of three main components. The first component demonstrates a collaborative web-based application for the creation and management of products and services by engineers and designers of multiple disciplines. The second component is a Product-Service configuration tool for customers, enabling the easy and intuitive formation of Products and Services. The same component will be used for managing product related data pertaining to the manufacturer, supplier and the customer. The third component will support the efficient, adaptive and responsive planning and decision making phases, for managing the dynamic operation of the plants and the supply chain. All the components will be compatible with open standards, such as AutomationML, in order to make the most out of and accelerate the adoption by the European industry. The ICP4Life project will address the current needs of todays manufacturers, providing faster design of modular equipment and components, the seamless collaboration of engineers across a wider network of companies as well as within a single company with disperse engineering offices and production sites and the reuse of knowledge regarding both products and processes for new projects or the configuration of existing lines. The ICP4Life consortium consists of highly skilled organizations to ensure the success of this project.

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