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Simulation Methodologies of Engine Noise Shielding by Wings Within Conceptual Aircraft Design

Vieira, Ana and Koch, Marc and Bertsch, Lothar and Snellen, Mirjam and Simons, Dick G. (2020) Simulation Methodologies of Engine Noise Shielding by Wings Within Conceptual Aircraft Design. Journal of Aircraft, XX, pp. 1-10. American Institute of Aeronautics and Astronautics (AIAA). doi: 10.2514/1.C035847. ISSN 0021-8669.

Full text not available from this repository.

Official URL: https://doi.org/10.2514/1.C035847

Abstract

The pursuit of greener aviation led to the investigation of new aircraft concepts. Disruptive aircraft configurations show great potential in reducing the ground noise impact, but extensive research is required before they can be manufactured. Tube-and-wing aircraft with over-the-wing engines, benefiting from noise shielding, are a more feasible option for midterm noise reduction targets. This work explores a low-noise version of the B747-400 considering over-the-wing engines, and a multidisciplinary procedure is used to calculate the aircraft and engine performance, the flight procedure, and the noise impact. Engine positions are found providing maximum engine noise shielding, reflected in a decrease in the sound exposure level (SEL) contours. These contours are calculated considering the wing leading edge as both a sharp and a curved edge. This work investigates whether a sharp leading-edge approximation is acceptable for first estimates of the optimal engines position and corresponding noise reduction values. From the results it is found that the maximum decrease in the SEL obtained for the modified aircraft is 2 dB considering a sharp leading edge and 1.5 dB for a curved leading edge, for departure. For approach, the SEL contours do not show significant differences for the sharp and curved leading edge, with maximum noise reduction values of 3.5 dB for both cases.

Item URL in elib:https://elib.dlr.de/133243/
Document Type:Article
Additional Information:ISSNs Print: 0021-8669, Electronic: 1533-3868
Title:Simulation Methodologies of Engine Noise Shielding by Wings Within Conceptual Aircraft Design
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Vieira, AnaDelft University of TechnologyUNSPECIFIED
Koch, MarcMarc.Koch (at) dlr.dehttps://orcid.org/0000-0002-5922-9104
Bertsch, LotharLothar.Bertsch (at) dlr.dehttps://orcid.org/0000-0003-2780-2858
Snellen, MirjamDelft University of TechnologyUNSPECIFIED
Simons, Dick G.Delft University of TechnologyUNSPECIFIED
Date:19 July 2020
Journal or Publication Title:Journal of Aircraft
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:XX
DOI :10.2514/1.C035847
Page Range:pp. 1-10
Editors:
EditorsEmailEditor's ORCID iD
UNSPECIFIEDAIAAUNSPECIFIED
Publisher:American Institute of Aeronautics and Astronautics (AIAA)
ISSN:0021-8669
Status:Published
Keywords:shielding, aircraft noise, low-noise aircraft, fan noise, noise reduction
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 (old)
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Helicopter, GO
Deposited By: Carter, Beatrice
Deposited On:04 Sep 2020 09:39
Last Modified:05 Nov 2020 21:58

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