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Helicopter Rotor Trim and Blade Motion Perturbations Caused by Wake Vortices of Wind Turbines and Fixed Wing Aircraft

van der Wall, Berend G. and Lehmann, Paul Hermann (2017) Helicopter Rotor Trim and Blade Motion Perturbations Caused by Wake Vortices of Wind Turbines and Fixed Wing Aircraft. 6th ARF & Heli Japan 2017, 7.-9. Nov. 2017, Kanazawa, Japan.

Full text not available from this repository.

Abstract

With increasing numbers of large wind turbines on-shore and off-shore, interactions of their wake with helicopters 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/112961/
Document Type:Conference or Workshop Item (Speech)
Title:Helicopter Rotor Trim and Blade Motion Perturbations Caused by Wake Vortices of Wind Turbines and Fixed Wing Aircraft
Authors:
AuthorsInstitution or Email of AuthorsAuthors 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:November 2017
Refereed publication:Yes
Open Access:No
In DOAJ:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 1-21
Status:Published
Keywords:Wake vortex interaction, helicopter trim, rotor blade motion
Event Title:6th ARF & Heli Japan 2017
Event Location:Kanazawa, Japan
Event Type:international Conference
Event Dates:7.-9. Nov. 2017
Organizer:Japan Helicopter Society
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
Location: Braunschweig
Institutes and Institutions:Institute of Flight Systems > Rotorcraft
Deposited By: van der Wall, Prof. Dr. Berend G.
Deposited On:21 Nov 2017 10:42
Last Modified:21 Nov 2017 10:42

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