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Engine Noise Source Placement for Shielding Calculation

Koch, Marc and Bertsch, Lothar (2019) Engine Noise Source Placement for Shielding Calculation. In: Inter-Noise 2019. Inter-Noise 2019, 16.-19. Juni 2019, Madrid, Spanien.

Full text not available from this repository.

Official URL: https://internoise2019.org/

Abstract

Shielding the fan sound is a key element to further reduce aircraft noise immission of future aircraft designs. In recent studies the engine is represented as a single point source within scientific aircraft noise prediction tools, which can be a good approximation. In most low noise concept studies the engine is mounted above the wing or above the fuselage. The attenuation depends on the engine chordwise position due to the fact that either the fan forward noise or the fan aft noise is significantly shielded by the wing. The investigated simulation approach models the engine noise shielding more realistic by splitting the engine noise source into two noise sources. Herein one noise source is placed at the engine inlet position and radiates the fan forward noise, while the second one is placed at the nozzle exit position and radiates the fan aft noise. Depending on the relative position of the noise source to the aircraft surface, the results of attenuation due to shielding can be improved. This study investigates the differences in the results of splitting approach compared to a single point source approach.

Item URL in elib:https://elib.dlr.de/127283/
Document Type:Conference or Workshop Item (Speech)
Title:Engine Noise Source Placement for Shielding Calculation
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Koch, MarcMarc.Koch (at) dlr.dehttps://orcid.org/0000-0002-5922-9104
Bertsch, LotharLothar.Bertsch (at) dlr.dehttps://orcid.org/0000-0003-2780-2858
Date:June 2019
Journal or Publication Title:Inter-Noise 2019
Refereed publication:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Shielding, engine noise, split engine noise source
Event Title:Inter-Noise 2019
Event Location:Madrid, Spanien
Event Type:international Conference
Event Dates:16.-19. Juni 2019
Organizer:Spanish Acoustical Society –SEA
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: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Helicopter, GO
Deposited By: Winkels, Elisabeth
Deposited On:12 Jul 2019 10:33
Last Modified:12 Jul 2019 10:33

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