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Full-Scale A320 Landing Gear Airframe Noise Characteristics

Dobrzynski, W. and Buchholz, H. (1996) Full-Scale A320 Landing Gear Airframe Noise Characteristics. DLR-Interner Bericht. 129-96/43, 110 S.

Full text not available from this repository.

Abstract

Flyover noise levels of today's aircraft in the approach configuration - i.e. with slats, flaps and gears deployed -are occasionally dominated by airframe noise contributions. Initial airframe noise tests were performed in the German-Dutch Wind Tunnel, employing full-scale A320 landing gears. Farfield noise characteristics were determined from measurements with different gear configurations (covering different gear elements with streamlined fairings) at wind speeds ranging from 40 to 78 m/s. Aerodynamic noise from landing gears turnes out to be broadband with constant levels in 1/3-oct. bands up to 3 kHz. Levels increase corresponding to the 6th power of flow velocity. From the results of this study it is expected that a noise reduction potential of up to 5 EPNdB could be realized through localized applications of streamlined fairings and/or flow spoilers.

Document Type:Monograph (DLR-Interner Bericht)
Additional Information: LIDO-Berichtsjahr=1996,
Title:Full-Scale A320 Landing Gear Airframe Noise Characteristics
Authors:
AuthorsInstitution or Email of Authors
Dobrzynski, W.UNSPECIFIED
Buchholz, H.UNSPECIFIED
Date:1996
Number of Pages:110
Status:Published
Keywords:Airframe Noise, Landing Gear Noise
HGF - Research field:UNSPECIFIED
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:UNSPECIFIED
DLR - Program:no assignment
DLR - Research theme (Project):L - Human Factors and Safety in Aeronautics
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Institut für Entwurfsaerodynamik
Deposited By: elib DLR-Beauftragter
Deposited On:03 Apr 2006
Last Modified:27 Apr 2009 10:06

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