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Development of a Slat Cover Liner

Pott-Pollenske, Michael (2021) Development of a Slat Cover Liner. In: AIAA Aviation and Aeronautics Forum and Exposition, AIAA AVIATION Forum 2021. 2021 AIAA AVIATION Forum and Exposition, 2.-6.August 2021, VIRTUAL EVENT. doi: 10.2514/6.2021-2114. ISBN 978-162410610-1.

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Slat noise reduction is one major challenges in the attempt to reduce high lift system generated airframe noise. The particularity of the slat is the strong governance of the low speed aerodynamic performance, which at the end depends also on small details like e.g. an optimized the slat gap size. Even though it is well known that the gap size has high influence on the noise generation, its modification for the sake of a quick and cheap noise reduction is nearly impossible as it would require the complete aerodynamic re-assessment of the aircraft. Against this background a passive liner solution to be installed in the slat cove was investigated in the German national funded research project MOVE.ON (Multi-Optimierung und Verifizierung von Entwuerfen durch Performance Tests und Simulationen ). Based on parametric studies with the small scale DLR F16 high lift system in DLR’s Acoustic Wind Tunnel Braunschweig a first and non-optimized prototype of a slat cove liner was developed. The effect on slat noise was a 3 dB reduction without meaningful aerodynamic penalties. Based on these results an improved version of this liner was manufactured to be tested with the large scale DLR F15LS high lift system. This quasi full-scale version of the slat cove liner proofed the aforementioned findings of a 3 dB noise reduction without aerodynamic penalties. In parallel to the experimental studies numerical acoustic simulations were carried out. The scope of these simulations was to recompute the liner configuration in view of a future numerical design of such technologies.

Item URL in elib:https://elib.dlr.de/143558/
Document Type:Conference or Workshop Item (Speech)
Title:Development of a Slat Cover Liner
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Pott-Pollenske, MichaelUNSPECIFIEDhttps://orcid.org/0000-0002-9996-5624UNSPECIFIED
Date:3 August 2021
Journal or Publication Title:AIAA Aviation and Aeronautics Forum and Exposition, AIAA AVIATION Forum 2021
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Umströmungseräusch, Lärmminderung
Event Title:2021 AIAA AVIATION Forum and Exposition
Event Location:VIRTUAL EVENT
Event Type:international Conference
Event Dates:2.-6.August 2021
Organizer:American Institute of Aeronautics & Astronautics
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 - Aircraft Technologies and Integration
Location: Braunschweig
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Technical Acoustics
Deposited By: Pott-Pollenske, Stephan-Michael
Deposited On:19 Aug 2021 09:11
Last Modified:10 Aug 2023 07:25

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