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About the Impact of Wind Turbine Wake Vortices on Helicopter Trim and Rotor Blade Motion

van der Wall, Berend G. and Lehmann, Paul Hermann (2017) About the Impact of Wind Turbine Wake Vortices on Helicopter Trim and Rotor Blade Motion. 43rd European Rotorcraft Forum, 12.-15. Sep. 2017, Milano, Italy.

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With increasing numbers of large wind turbines on-shore and off-shore, interactions of their wake with heli-copters become interesting. In this paper the wake is modeled as a tip vortex helix with a vortex strength estimated from the wind turbine thrust. Helicopter rotors of different size are subjected to the wake and the collective and cyclic controls required to keep the trim are compared to the maximum available controls of the rotorcraft. In addition the blade flapping response due to the vortex influence without pilot action is computed and compared to maximum flapping angles allowed. It is found that typical onshore wind turbines could be a hazard for ultralight helicopters, but not for larger helicopters. Large offshore wind turbines, how-ever, could even be a danger for small helicopters that may be used for maintenance. In addition the results are compared to fixed-wing wake vortex interaction with a helicopter as given in the literature.

Item URL in elib:https://elib.dlr.de/110794/
Document Type:Conference or Workshop Item (Speech)
Title:About the Impact of Wind Turbine Wake Vortices on Helicopter Trim and Rotor Blade Motion
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
van der Wall, Berend G.berend.vanderwall (at) dlr.dehttps://orcid.org/0000-0001-6144-0921
Lehmann, Paul Hermannpaul.lehmann (at) dlr.deUNSPECIFIED
Date:September 2017
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 1-18
Keywords:rotor-wake interaction, rotor blade flapping, rotor trim, rotor dynamics
Event Title:43rd European Rotorcraft Forum
Event Location:Milano, Italy
Event Type:international Conference
Event Dates:12.-15. Sep. 2017
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:rotorcraft
DLR - Research area:Aeronautics
DLR - Program:L RR - Rotorcraft Research
DLR - Research theme (Project):L - The Innovative Rotorcraft (old)
Location: Braunschweig
Institutes and Institutions:Institute of Flight Systems > Rotorcraft
Deposited By: van der Wall, Prof. Dr. Berend G.
Deposited On:10 Oct 2017 14:55
Last Modified:10 Oct 2017 14:55

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