publication . Article . 2015

Analysis of the sweeped actuator line method

Jörn Nathan; Christian Masson; Louis Dufresne; Matthew Churchfield;
Open Access English
  • Published: 01 Jan 2015 Journal: E3S Web of Conferences (issn: 2267-1242, Copyright policy)
  • Publisher: EDP Sciences
Abstract
The actuator line method made it possible to describe the near wake of a wind turbine more accurately than with the actuator disk method. Whereas the actuator line generates the helicoidal vortex system shed from the tip blades, the actuator disk method sheds a vortex sheet from the edge of the rotor plane. But with the actuator line come also temporal and spatial constraints, such as the need for a much smaller time step than with actuator disk. While the latter one only has to obey the Courant-Friedrichs-Lewy condition, the former one is also restricted by the grid resolution and the rotor tip-speed. Additionally the spatial resolution has to be finer for the ...
Subjects
arXiv: Computer Science::RoboticsComputer Science::Systems and ControlComputer Science::OtherPhysics::Fluid Dynamics
free text keywords: Environmental sciences, GE1-350, Aerospace engineering, business.industry, business, Image resolution, Actuator, Vortex sheet, Turbine, Engineering, Wake, Mechanical engineering, Vortex, Rotor (electric), law.invention, law, Grid
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