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/ | ||||||
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Document Type: | Conference or Workshop Item (Speech) | ||||||
Title: | Findings in Aero-Acoustic Simulations for Optimizations | ||||||
Authors: |
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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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