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Quieter and Greener Rotorcraft: Concurrent Aerodynamic and Acoustic Optimization

Wilke, Gunther Andreas (2020) Quieter and Greener Rotorcraft: Concurrent Aerodynamic and Acoustic Optimization. Deutsche Luft- und Raumfahrtkongress 2020, 01-03 Sep 2020, Aachen.

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Abstract

Within the DLR project VicToria an aerodynamic and aero-acoustic optimization of helicopter rotor blades is performed. During the optimization, three independent flight conditions are considered: hover, cruise and descent flight. The first two flight conditions drive the power requirements of the helicopter rotor, while the descent flight is the loudest flight condition for current helicopter generations. In order to drive down the required power and the emitted noise, a multi-objective design approach coupled with surrogate models is utilized to find a Pareto optimal set of rotors. This approach allows to identify the trade-offs to be made when laying emphasis on either goal function. The underlying CFD simulations utilize fourth order accurate spatial schemes to capture the vortex dominated flow of helicopter rotor blades. The paper presents the validation of the setups, the optimization results and the off-design analysis of a chosen set of blades from the Pareto front. The conclusion is that the utilization of the Pareto front approach is necessary to find good rotor designs, while the utilization of high order methods allows for efficient CFD setups.

Item URL in elib:https://elib.dlr.de/135922/
Document Type:Conference or Workshop Item (Lecture)
Title:Quieter and Greener Rotorcraft: Concurrent Aerodynamic and Acoustic Optimization
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Wilke, Gunther AndreasGunther.Wilke (at) dlr.dehttps://orcid.org/0000-0002-1915-5307
Date:2 September 2020
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Rotorcraft, multi-disciplinary optimization, surrogate based optimization, multi-objective
Event Title:Deutsche Luft- und Raumfahrtkongress 2020
Event Location:Aachen
Event Type:national Conference
Event Dates:01-03 Sep 2020
Organizer:DGLR
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - VicToria (old)
Location: Braunschweig
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Helicopter, BS
Deposited By: Wilke, Gunther Andreas
Deposited On:08 Sep 2020 07:27
Last Modified:08 Sep 2020 07:27

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