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System noise assessment of a tube-and-wing aircraft with geared turbofan engines

Bertsch, Lothar and Wolters, Florian and Heinze, Wolfgang and Pott-Pollenske, Michael and Blinstrub, Jason (2019) System noise assessment of a tube-and-wing aircraft with geared turbofan engines. Journal of Aircraft. American Institute of Aeronautics and Astronautics (AIAA). DOI: 10.2514/1.C034935 ISSN 0021-8669

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Official URL: https://doi.org/10.2514/1.C034935


A geared turbofan of increased bypass ratio promises reduced engine noise generation if compared to onventional turbofan engines with lower bypass ratios. As a result, the dominance of other noise sources on-board of an aircraft with geared turbofan engines are emphasized and will become more relevant. Consequently, to get an understanding of the modified noise source ranking due to the new engine concept, a noise assessment of the overall aircraft noise as received on the ground is essential, i.e., a so called system noise assessment. For this study a DLR & TU Braunschweig aircraft design synthesis process with integrated noise prediction capabilities is applied. The noise assessment is not limited to the overall vehicle noise as received on the ground but moreover the dominance and ranking of all individual noise sources is discussed. A direct comparison and evaluation of the flight performance and the system noise of the different vehicle variants under consideration is presented. Finally, the geared turbofan engine is also installed on board of an earlier low-noise aircraft concept featuring engine noise shielding. The influence of low-noise airframe measures in combination with a geared turbofan concept are promising, especially on an airframe architecture dedicated to engine noise shielding.

Item URL in elib:https://elib.dlr.de/118513/
Document Type:Article
Title:System noise assessment of a tube-and-wing aircraft with geared turbofan engines
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Bertsch, LotharLothar.Bertsch (at) dlr.dehttps://orcid.org/0000-0003-2780-2858
Heinze, WolfgangTU-BraunschweigUNSPECIFIED
Pott-Pollenske, Michaelmichael.pott-pollenske (at) dlr.deUNSPECIFIED
Blinstrub, Jasonjason.blinstrub (at) dlr.dehttps://orcid.org/0000-0003-1913-0529
Date:9 April 2019
Journal or Publication Title:Journal of Aircraft
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.2514/1.C034935
Publisher:American Institute of Aeronautics and Astronautics (AIAA)
Series Name:Journal of Aircraft
Keywords:aircraft system noise, noise prediction, PANAM, PrADO, geared turbofan
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 - Simulation and Validation
Location: Braunschweig , Göttingen , Köln-Porz
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Helicopter, GO
Institute of Propulsion Technology > Engine
Institute for Aerodynamics and Flow Technology > Technical Acoustics
Deposited By: Bertsch, Dr.-Ing. Lothar
Deposited On:29 Jan 2018 10:44
Last Modified:07 Jun 2019 12:18

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