Sylvain Antheaume | General Electric (original) (raw)
Uploads
Papers by Sylvain Antheaume
... flux transverse (hydroliennes) dont un des int?r?ts est d??tre indiff?rentes ? la direction d... more ... flux transverse (hydroliennes) dont un des int?r?ts est d??tre indiff?rentes ? la direction du courant incident. Cet avantage est particuli?rement int?ressant pour les courants mar?moteurs qui peuvent ?tre giratoires. Le LEGI a propos? un concept de parc dont l?unit? ...
As developing sources of renewable energy becomes a critical priority, research in this field bec... more As developing sources of renewable energy becomes a critical priority, research in this field become more essential. A novel method to produce clean renewable energy is extraction from ocean tides via a turbine. Although energy generation from tidal currents has many similarities to wind, the balance between kinetic and potential energy is a key element in tidal channels that invalidates
Renewable Energy, 2008
... Numerous micro-hydro power plants, presently build on rivers and canals, contribute also to .... more ... Numerous micro-hydro power plants, presently build on rivers and canals, contribute also to ... Another solution is to design symmetrical propeller blades like in the Marenergy project [3 ... type water turbines (from Jean-Marie Darrieus, inventor of the first vertical axis wind turbine). ...
AIAA Journal, 2011
ABSTRACT The time spectral method converts a time-periodic flow computation into the solution of ... more ABSTRACT The time spectral method converts a time-periodic flow computation into the solution of 2N + 1 coupled steady computations, where N denotes the number of harmonics retained in the Fourier analysis of the flow. The efficiency of the method has been previously demonstrated by several authors for compressible flow applications on structured grids using implicit solution of the large-scale steady system introduced by the coupling. In this paper, the time spectral method is extended to periodic incompressible viscous flows using a finite volume formulation of the artificial compressibility system on general moving unstructured grids. Numerical simulations of low-Reynolds flows over an airfoil show the time spectral method can afford, though not systematically, a reduction by a factor up to 5 of the computational cost with respect to a conventional unsteady technique, which computes the whole transient flow behavior.
In 2001, the Geophysical and Industrial Fluid Flows laboratory (LEGI-France) launched the HARVEST... more In 2001, the Geophysical and Industrial Fluid Flows laboratory (LEGI-France) launched the HARVEST research program (Hydroliennes à Axe de Rotation VErtical STabilisé) to better understand and develop a suitable technology for hydroelectric marine or river power farms using Cross Flow Water Turbines (CFWT) piled up in towers. The LEGI researches deal with the hydrodynamic part of these systems, with the support of the R&D Division of the EDF Group; other laboratories of the Rhône-Alpes Region are in charge of the respective mechanical (3S-INPG and LDMS-INSA) and electrical aspects (LEG-INPG). The present study deals with the study of CFWT arrangements. In a first part, a single turbine for free fluid flow conditions is considered. The simulations are carried out with a new in house code which cou- ples a Navier-Stokes computation of the outer flow field with a description of the inner flow field around the turbine. The latter approach is validated with experimental results of a Darri...
... flux transverse (hydroliennes) dont un des int?r?ts est d??tre indiff?rentes ? la direction d... more ... flux transverse (hydroliennes) dont un des int?r?ts est d??tre indiff?rentes ? la direction du courant incident. Cet avantage est particuli?rement int?ressant pour les courants mar?moteurs qui peuvent ?tre giratoires. Le LEGI a propos? un concept de parc dont l?unit? ...
As developing sources of renewable energy becomes a critical priority, research in this field bec... more As developing sources of renewable energy becomes a critical priority, research in this field become more essential. A novel method to produce clean renewable energy is extraction from ocean tides via a turbine. Although energy generation from tidal currents has many similarities to wind, the balance between kinetic and potential energy is a key element in tidal channels that invalidates
Renewable Energy, 2008
... Numerous micro-hydro power plants, presently build on rivers and canals, contribute also to .... more ... Numerous micro-hydro power plants, presently build on rivers and canals, contribute also to ... Another solution is to design symmetrical propeller blades like in the Marenergy project [3 ... type water turbines (from Jean-Marie Darrieus, inventor of the first vertical axis wind turbine). ...
AIAA Journal, 2011
ABSTRACT The time spectral method converts a time-periodic flow computation into the solution of ... more ABSTRACT The time spectral method converts a time-periodic flow computation into the solution of 2N + 1 coupled steady computations, where N denotes the number of harmonics retained in the Fourier analysis of the flow. The efficiency of the method has been previously demonstrated by several authors for compressible flow applications on structured grids using implicit solution of the large-scale steady system introduced by the coupling. In this paper, the time spectral method is extended to periodic incompressible viscous flows using a finite volume formulation of the artificial compressibility system on general moving unstructured grids. Numerical simulations of low-Reynolds flows over an airfoil show the time spectral method can afford, though not systematically, a reduction by a factor up to 5 of the computational cost with respect to a conventional unsteady technique, which computes the whole transient flow behavior.
In 2001, the Geophysical and Industrial Fluid Flows laboratory (LEGI-France) launched the HARVEST... more In 2001, the Geophysical and Industrial Fluid Flows laboratory (LEGI-France) launched the HARVEST research program (Hydroliennes à Axe de Rotation VErtical STabilisé) to better understand and develop a suitable technology for hydroelectric marine or river power farms using Cross Flow Water Turbines (CFWT) piled up in towers. The LEGI researches deal with the hydrodynamic part of these systems, with the support of the R&D Division of the EDF Group; other laboratories of the Rhône-Alpes Region are in charge of the respective mechanical (3S-INPG and LDMS-INSA) and electrical aspects (LEG-INPG). The present study deals with the study of CFWT arrangements. In a first part, a single turbine for free fluid flow conditions is considered. The simulations are carried out with a new in house code which cou- ples a Navier-Stokes computation of the outer flow field with a description of the inner flow field around the turbine. The latter approach is validated with experimental results of a Darri...