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Comparison of Different Approaches for Modeling Vortex – Rotor Wake Interference on Rotor Trim

van der Wall, Berend G. (2020) Comparison of Different Approaches for Modeling Vortex – Rotor Wake Interference on Rotor Trim. 76th Annual Forum & Technology Display, 6.-8. October 2020, Online Conference, VA, USA.

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Abstract

The flight of a helicopter within the wake of a preceding fixed-wing aircraft, for example during air-to-air refueling, is accompanied by vortex-rotor interactions. Prior studies made use of many simplifying assumptions such as ignor-ing any interactions of the rotor wake with the fixed-wing tip vortex, or assuming a vortex deflection into the rotor slipstream once the vortex reaches the rotor disk. The full mutuality of vortex and rotor wake interactions requires a free-wake solution to the problem. In the paper free-wake solutions are presented for different advance ratios and compared to existing simplified solutions. The results indicate that the simplified solutions are valid for higher ad-vance ratios whereas very small advance ratios require the use of a free-wake approach.

Item URL in elib:https://elib.dlr.de/129429/
Document Type:Conference or Workshop Item (Speech)
Additional Information:Beitrag zum DLR-Projekt URBAN-Rescue zum Themenbereich "Aerodynamic Interactions"
Title:Comparison of Different Approaches for Modeling Vortex – Rotor Wake Interference on Rotor Trim
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
Date:October 2020
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 1-16
Status:Published
Keywords:Helicopter, Aerodynamic interaction, Rotor aerodynamics, Vortex-Rotor interaction, Numerical methods
Event Title:76th Annual Forum & Technology Display
Event Location:Online Conference, VA, USA
Event Type:international Conference
Event Dates:6.-8. October 2020
Organizer:The Vertical Flight 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 (old)
Location: Braunschweig
Institutes and Institutions:Institute of Flight Systems > Rotorcraft
Deposited By: van der Wall, Prof. Dr. Berend G.
Deposited On:22 Dec 2020 17:16
Last Modified:12 Jan 2021 16:03

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