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The Challenge To Break The Ultimate Noise Barrier: Sources and Control of Airframe Noise

Heller, H. and Dobrzynski, W. (2001) The Challenge To Break The Ultimate Noise Barrier: Sources and Control of Airframe Noise. 8th International Congress on Sound and Vibration, Hong Kong (vrc), 02.-06.07.2001.

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Abstract

The expected increase in stringency of the ICAO Chapter-3 noise certification limits necessitates the development of source noise reduction technologies for future subsonic commerical aeroplanes entering the market in the next two decades. The noise from such aeroplanes during landing approach is dominated by airframe noise, i.e. the noise generated by the interaction of flow and aircraft components deployed for landing, such as landing gears and wing high-lift devices. This paper discusses highlights from recent appropriate national and European research projects which were initiated to further the understanding of the underlying aeroacoustic source mechanisms through wind tunnel tests employing full-scale landing gears and a full-scale wing and to demonstrate the potential of yielding up to 3 dB noise reduction in the farfield by means of technically feasible design changes on these aircraft components.

Document Type:Conference or Workshop Item (Speech)
Additional Information: LIDO-Berichtsjahr=2003,
Title:The Challenge To Break The Ultimate Noise Barrier: Sources and Control of Airframe Noise
Authors:
AuthorsInstitution or Email of Authors
Heller, H.UNSPECIFIED
Dobrzynski, W.UNSPECIFIED
Date:2001
Status:Published
Keywords:Aircraft Noise, Airframe Noise, Acoustic Wind Tunnel Testing
Event Title:8th International Congress on Sound and Vibration, Hong Kong (vrc), 02.-06.07.2001
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:L VU - Air Traffic and Environment (old)
DLR - Research area:Aeronautics
DLR - Program:L VU - Air Traffic and Environment
DLR - Research theme (Project):L - Quiet Air Traffic (old)
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology
Deposited By: Claudia Grant
Deposited On:31 Jan 2006
Last Modified:14 Jan 2010 19:03

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