Ecole Polytechnique Federale de Lausanne

2021 ◽  
pp. 369-370
Keyword(s):  
École Polytechnique

Dependency of Unsteady Time-Linearized Flutter Investigations on the Steady State Flow Field

2011 ◽  
Author(s):  
Michael Blocher ◽  
Markus May ◽  
Harald Schoenenborn
Keyword(s):  
Steady State ◽  
Steady State Solution ◽  
Elastic Stability ◽  
Compressor Cascade ◽  
Steady State Flow ◽  
State Flow ◽  
Flow Parameters ◽  
Pressure Distributions ◽  
German Aerospace ◽  
École Polytechnique

The influence of the steady state flow solution on the aero-elastic stability behaviour of an annular compressor cascade shall be studied in order to determine sensitivities of the aero-dynamic damping with respect to characteristic flow parameters. In this context two different flow regimes — a subsonic and a transonic case — are subject to the analysis. The pressure distributions, steady as well as unsteady, on the blade surface of the NACA3506 profile are compared to experimental data that has been gained by the Institute of Aeroelasticity of the German Aerospace Center (DLR) during several wind tunnel tests at the annular compressor cascade facility RGP-400 of the Ecole Polytechnique Fe´de´rale de Lausanne (EPFL). Whereas a certain robustness of the unsteady CFD results can be stated for the subsonic flow regime, the transonic regime proves to be very sensitive with respect to the steady state solution.

EXPERIENCE DE PARRAINAGE DANS UNE ECOLE POLYTECHNIQUE⋆

1976 ◽  
Vol 1 (2) ◽  
pp. 108-112 ◽  
Author(s):  
MARCEL LUCIEN GOLDSHEMID ◽  
CHRISTOF BURCKHARDT
Keyword(s):  
École Polytechnique

Le armi dotte e la Rivoluzione francese: riformismo, elitismo e meritocrazia

2012 ◽  
pp. 41-63
Author(s):  
Lorenzo Cuccoli
Keyword(s):  
Eighteenth Century ◽  
Public Services ◽  
The State ◽  
Constituent Assembly ◽  
State Corporation ◽  
The Creation ◽  
École Polytechnique ◽  
The Military ◽  
The Revolution

The article focuses on the evolution of the military technical corps in France between the mid-Eighteenth century and the Restoration, and proposes for them the notion of "State corporation". This phase - an intermediate one between the corps de métier and the corps d'État - was attained first by the engineers and the artillery. These corps selected their officers by competitive examination, which functioned both as an intellectual filter and a social one. The distinction generated by this filter - nurtured by an elitist approach based on meritocracy was not overridden by the Revolution. On the contrary, it was further consecrated by the creation of the École polytechnique, which soon became controlled by the military technical corps. The "State corporation" model was then extended through the École polytechnique to the geographical engineers and the civil public services. The institutional conflicts among the technical corps during the National Constituent Assembly and those between them and the École polytechnique (1794-1799) are analyzed along these interpretative lines. While the former show their corporative resistance of geographical engineers in the name of equality, the latter bring out their corporative resistance to external education of candidates.

On the transformation of the Ecole Polytechnique archives

1986 ◽  
Vol 19 (1) ◽  
pp. 45-50 ◽  
Author(s):  
I. Grattan-Guinnes
Keyword(s):  
French Revolution ◽  
Exhaustive Study ◽  
École Polytechnique ◽  
The French Revolution

The important role played by the Ecole Polytechnique in the resurgence of science in France after the French Revolution, and its progress ever since, has led to much historical work on its foundation and development. Some of these studies have brought historians to the school's archives; and there chaos has awaited them, for they found the main collections of documents sorted into containers which were nominally classified by calendar year but in fact could contain materials pertaining to various other times. In addition, very many other documents were stored without classification. Thus exhaustive study of the school's history has been difficult, not to say impossible.

scholarly journals Keep calm and fill in your DMP: Lessons Learnt from a Swiss DMP-template initiative

2018 ◽  
Vol 13 (1) ◽  
pp. 215-222 ◽  
Author(s):  
Lorenza Salvatori ◽  
Ana Sesartic ◽  
Nathalie Lambeng ◽  
Eliane Blumer
Keyword(s):  
National Science Foundation ◽  
Life Cycle Management ◽  
Management Plan ◽  
National Data ◽  
Swiss National Science Foundation ◽  
Horizon 2020 ◽  
Data Life Cycle ◽  
Institutes Of Technology ◽  
National Science ◽  
École Polytechnique

Aligning with other funders such as Horizon 2020, the Swiss National Science Foundation (SNSF) requires researcherswho apply for project funding to provide a Data Management Plan (DMP) as an integral part of their research proposal.In an attempt to assist and guide researchers filling out this document, and to provide a service as efficient as possible, the libraries of the Ecole Polytechnique Fédérale de Lausanne (EPFL) and ETH Zurich took the lead to elaborate on a DMP template with content suggestions and recommendations. In this practice paper, we will describe the collaborative effort between the two Swiss federal institutes of technology, namely EPFL and ETH Zurich, as well as some partners of the national Data Life Cycle Management (DLCM) project, which resulted in a very helpful document as reported by our researchers.

Sailing Yacht Design Using Advanced Numerical Flow Techniques

1999 ◽  
Author(s):  
Mario Caponnetto ◽  
Alessandro Castelli ◽  
Philippe Dupont ◽  
Bernard Bonjour ◽  
Pierre-Louis Mathey ◽  
...  
Keyword(s):  
Computer Technology ◽  
Flow Simulation ◽  
Numerical Techniques ◽  
Flow Simulations ◽  
Competitive Edge ◽  
Numerical Flow Simulation ◽  
Sailing Yacht ◽  
America’S Cup ◽  
École Polytechnique ◽  
First Time

The 30th America's Cup will be held in New Zealand, commencing in October 1999. For the first time a Swiss team, the FAST2000 Challenge of the Club Nautique Morgien, will compete. Three laboratories of the EPFL (Ecole Polytechnique Federale de Lausanne) are collaborating with FAST2000 in the design of the boat that will race in the Cup challenges. Present-day design of IACC racing yachts relies on the use of numerical flow simulations to obtain a competitive edge. The computation of the complex hydrodynamic and aerodynamic flows around sailing yachts provides valuable information to supplement the more conventional empirical and experimental design techniques. Such flow simulations, however, are extremely challenging and thus often require state­of-the-art numerical techniques and computer technology. A number of the issues critical to IACC yacht design are discussed, and various approaches described to address them through the use of advanced numerical flow simulation.

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