Dobrzynski, W. and Buchholz, H. (1996) Full-Scale A320 Landing Gear Airframe Noise Characteristics. DLR-Interner Bericht. 129-96/43, 110 S.
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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)|
|Title:||Full-Scale A320 Landing Gear Airframe Noise Characteristics|
|Number of Pages:||110|
|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 08:06|
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