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In-Plane Vortex-Rotor Interaction and its Implication on Rotor Trim: an Analytic Solution for Arbitrary Vortex Orientation and Position

van der Wall, Berend G. and van der Wall, Lennert B. (2021) In-Plane Vortex-Rotor Interaction and its Implication on Rotor Trim: an Analytic Solution for Arbitrary Vortex Orientation and Position. In: 47th European Rotorcraft Forum, pp. 1-15. 47th European Rotorcraft Forum, 7.-9. Sept. 2021, Online.

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Abstract

The general aerodynamic problem of arbitrary oriented in-plane vortex-rotor interaction was investigated in the past only by numerical simulation. Just one special case of in-plane vortex-rotor interaction with the vor-tex axis in flight direction was recently solved analytically. In this paper the analytical solution for arbitrary in-plane vortex orientation and position relative to the rotor on thrust and hub moments is given that was pub-lished for the first time just before. Results provide the vortex impact on rotor trim (thrust, aerodynamic roll-ing and pitching moments about the hub) and the rotor controls required to mitigate these disturbances. In this paper the sensitivity of these results with respect to the main parameters will be given: the vortex core radius, its distance to the rotor center and its orientation angle relative to the rotor longitudinal axis, the rotor blade begin and end of the airfoiled section, and the advance ratio.

Item URL in elib:https://elib.dlr.de/141486/
Document Type:Conference or Workshop Item (Speech)
Title:In-Plane Vortex-Rotor Interaction and its Implication on Rotor Trim: an Analytic Solution for Arbitrary Vortex Orientation and Position
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
van der Wall, Berend G.Berend.VanDerWall (at) dlr.dehttps://orcid.org/0000-0001-6144-0921
van der Wall, Lennert B.lvdw172 (at) gmail.comUNSPECIFIED
Date:September 2021
Journal or Publication Title:47th European Rotorcraft Forum
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 1-15
Status:Published
Keywords:rotorcraft, aerodynamic interaction, vortex-rotor interaction, helicopter aerodynamics
Event Title:47th European Rotorcraft Forum
Event Location:Online
Event Type:international Conference
Event Dates:7.-9. Sept. 2021
Organizer:Royal Aeronautical Society
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Efficient Vehicle
DLR - Research area:Aeronautics
DLR - Program:L EV - Efficient Vehicle
DLR - Research theme (Project):L - Virtual Rotorcraft and Validation
Location: Braunschweig
Institutes and Institutions:Institute of Flight Systems > Rotorcraft
Deposited By: van der Wall, Prof. Dr. Berend G.
Deposited On:30 Sep 2021 08:57
Last Modified:30 Sep 2021 08:57

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