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Aeroacoustic Assessment of Low-Observable UCAV Configurations

Rossignol, Karl-Stephane and Proskurov, Stanislav and Lummer, Markus and Ewert, Roland and Delfs, Jan Werner and Kolb, Alexander and Mancini, Simone (2020) Aeroacoustic Assessment of Low-Observable UCAV Configurations. STO. Specialists’ Meeting on Multidisciplinary Design Approaches and Performance Assessment of Future Combat Aircraft, 28.-30. Sep. 2020, Online Veranstaltung. doi: 10.14339/STO-MP-AVT-324. ISBN ISBN 978-92-837-2315-8.

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Official URL: https://www.sto.nato.int/publications/STO%20Meeting%20Proceedings/STO-MP-AVT-324/MP-AVT-324-09.pdf


First, results of experimental and numerical investigations on generic engine noise shielding by the SACCON UCAV configuration are presented. The results suggest that propulsion system intake noise is much less attenuated compared to exhaust noise. This is a consequence of the position of the intake on the symmetry plane of the UCAV as well as to the relatively large radius of curvature of the aircraft wings leading edge. This result emphasizes the potential necessity to achieve an acoustically optimized integration of both intake and exhaust altogether to maximize acoustic attenuation. The use of a generic, monopole-like, sound source in the experimental and numerical assessment of SACCON (Stability And Control CONfiguration) leaves many open questions with respect to the acoustic signature of a real UCAV configuration. For real highly-integrated propulsion systems, noise radiation from the intake and exhaust is critical to the acoustic detection of an aircraft, especially to low-observable configurations. Aiming at an assessment of the noise signature of a realistic UCAV configuration at an early design stage, experimental and numerical methodologies are presented which are able to account for mean flow and airframe interaction effects on noise generation and propagation. DLR-F24 MULDICON UCAV (MULti-Disciplinary CONfiguration) test bed is introduced, along with numerical simulations results providing first insights into the aeroacoustics of a realistic agile UCAV configuration.

Item URL in elib:https://elib.dlr.de/137698/
Document Type:Conference or Workshop Item (Speech)
Title:Aeroacoustic Assessment of Low-Observable UCAV Configurations
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Delfs, Jan WernerUNSPECIFIEDhttps://orcid.org/0000-0001-8893-1747UNSPECIFIED
Kolb, AlexanderAirbus Defence and SpaceUNSPECIFIEDUNSPECIFIED
Mancini, SimoneAirbus Defence and SpaceUNSPECIFIEDUNSPECIFIED
Date:4 April 2020
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
ISBN:ISBN 978-92-837-2315-8
Keywords:NATO STO-AVT-324, acoustic shielding, UAV, low-noise, low-observable, agile UAV, acoustic signature
Event Title:Specialists’ Meeting on Multidisciplinary Design Approaches and Performance Assessment of Future Combat Aircraft
Event Location:Online Veranstaltung
Event Type:international Conference
Event Dates:28.-30. Sep. 2020
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 - Flight Physics (old)
Location: Braunschweig
Institutes and Institutions:Institute for Aerodynamics and Flow Technology
Institute for Aerodynamics and Flow Technology > Technical Acoustics
Deposited By: Rossignol, Karl-Stephane
Deposited On:19 Nov 2020 07:34
Last Modified:19 Nov 2020 07:34

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