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Findings in Aero-Acoustic Simulations for Optimizations

Wilke, Gunther (2020) Findings in Aero-Acoustic Simulations for Optimizations. In: Vertical Flight Society's 76th Annual Forum and Technology Display. 76th Annual Forum, 5–8 Oct 2020, virtual.

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Abstract

The methods of the aero-acoustic optimization toolchain developed by DLR within the VicToria project are further analyzed. From previous investigations, it was settled that an unsteady panel code with a free-wake model poses a fast alternative to higher-order CFD simulations to predict blade-vortex interaction noise. In this paper, a brief validation of both methods against the HART II rotor is done. Design parametric studies with UPM are carried out for which single CFD simulations are placed to examine the correlation between both methods. In the end, an optimization with the panel code as well as CFD is conducted to see how good the final designs match. From this research it is observed that UPM captures plausible trends when altering the chord distribution, but is unable to replicate CFD results for more advance rotor designs based on blade sweep or an-/dihedral. In order to improve UPM for rotor design, it is recommended to additionally model viscosity and generalize the vortex roll-up model further.

Item URL in elib:https://elib.dlr.de/136612/
Document Type:Conference or Workshop Item (Speech)
Title:Findings in Aero-Acoustic Simulations for Optimizations
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Wilke, Gunthergunther.wilke (at) dlr.dehttps://orcid.org/0000-0002-1915-5307
Date:8 October 2020
Journal or Publication Title:Vertical Flight Society's 76th Annual Forum and Technology Display
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:HARTII, aero-acoustics, rotor optimization, CFD, free-wake
Event Title:76th Annual Forum
Event Location:virtual
Event Type:international Conference
Event Dates:5–8 Oct 2020
Organizer:The Vertical Flight Society
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:20 Oct 2020 13:20
Last Modified:20 Oct 2020 13:20

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