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

van der Wall, Berend G. and Lehmann, Paul Hermann (2018) About the Impact of Wind Turbine Blade Tip Vortices on Helicopter Rotor Trim and Rotor Blade Motion. CEAS Aeronautical Journal, 9 (1), pp. 1-18. Springer. doi: 10.1007/s13272-017-0276-x. ISSN 1869-5590.

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With increasing numbers of large wind turbines on-shore and off-shore, interactions of their wake with helicopters become a subject worth investigating. 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 and hub layout are subjected to the wake and the collective and cyclic control inputs required to keep the trim are compared to the maximum available control range of the rotorcraft. In addition the blade flapping response due to the vortex influence without pilot action is computed and compared to maximum allowed flapping angles. It is found that typical on-shore wind turbines could be a hazard for ultralight helicopters, but not for larger helicopters. Large off-shore wind turbines, however, 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/112960/
Document Type:Article
Title:About the Impact of Wind Turbine Blade Tip Vortices on Helicopter Rotor 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:20 January 2018
Journal or Publication Title:CEAS Aeronautical Journal
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
DOI :10.1007/s13272-017-0276-x
Page Range:pp. 1-18
Keywords:Wake vortex interaction, helicopter rotor trim, rotor blade motion
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:15 Feb 2018 15:17
Last Modified:15 Feb 2018 15:17

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