Zobrazeno 1 - 10
of 65
pro vyhledávání: '"Guy Dumas"'
Autor:
Olivier Lévesque, Guy Dumas
Publikováno v:
Energy Reports, Vol 9, Iss , Pp 226-239 (2023)
This paper presents a parametric study of H-Darrieus turbines in cavitating conditions. The objective of this work is to assess the impact of cavitation on turbine performances for a wide variety of configurations and under various operating conditio
Externí odkaz:
https://doaj.org/article/136a2ac215c64ea58476f5b693896bbf
Autor:
Benoît Genest, Guy Dumas
Publikováno v:
Energies, Vol 16, Iss 6, p 2885 (2023)
Refinement of the performance of a fully constrained oscillating-foil turbine is carried out via the addition of passive double Gurney flaps. Flaps ranging from hGF=0.005c to 0.075c are added at the trailing edge of the NACA 0015 blade of turbines op
Externí odkaz:
https://doaj.org/article/7dd6b732c4c746408a726a1c0042e319
Publikováno v:
Aerospace, Vol 4, Iss 3, p 41 (2017)
A detailed numerical investigation of the flow behind a square cylinder at a Reynolds number of 21,400 is conducted to assess the ability of the delayed detached-eddy simulation (DDES) modeling approach to accurately predict the velocity recovery in
Externí odkaz:
https://doaj.org/article/12ba84bd3cb0443a9cae037848e6f34f
Autor:
Benoît Genest, Guy Dumas
Publikováno v:
Journal of Aircraft. :1-15
The impact of single and double Gurney flaps of heights within the range of [Formula: see text] is determined for a typical symmetrical airfoil (NACA 0015) by numerical simulations using an unsteady Reynolds-averaged Navier–Stokes approach. The opt
Autor:
Guy Dumas, Olivier Gauvin-Tremblay
Publikováno v:
Renewable Energy. 181:851-869
In order to maximize the energy extraction of a hydrokinetic turbine array deployment, turbines must be positioned judiciously within the array. In fact, it is possible to optimize the array configuration in order to benefit from blockage effects and
Publikováno v:
Renewable Energy. 179:206-222
Three-dimensional numerical simulations of hydrokinetic flapping-foil turbines with fully-prescribed motions are carried out using a Delayed Detached-Eddy Simulation (DDES) approach. The objective is to assess the efficiency and the wake recovery rat
Autor:
Thierry Villeneuve, Guy Dumas
Publikováno v:
Renewable Energy. 180:1419-1438
Using delayed detached-eddy simulations, the objective of this paper is to show the effects of some design parameters on the wake recovery of vertical-axis turbines. To that end, the wake dynamics of a single-blade turbine is analyzed and compared fo
Publikováno v:
Renewable Energy. 169:1386-1401
The impact of the blade support structures (the struts) on the performance of vertical-axis turbines at a high Reynolds number is investigated here. Numerical simulations of a single-blade turbine with different strut configurations are carried out a
Publikováno v:
Renewable Energy. 150:31-45
In the present work, Delayed Detached-Eddy Simulations (DDES) are conducted to evaluate the performance of an H-Darrieus vertical-axis turbine with detached end-plates, namely stationary end-plates that are not in contact with the turbine blades. Mor
Publikováno v:
Renewable Energy. 146:1958-1975
The dynamics of a fully-passive flapping-foil turbine, operating at a Reynolds number of 3.9 × 10 6 , is studied via two-dimensional fluid-structure numerical simulations. The foil is allowed to move freely, but only, in heave and in pitch by being