Full-Scale Noise Testing on Airbus Landing Gears in the German-Dutch Wind Tunnel.
Dobrzynski, W. and Buchholz, H. (1997) Full-Scale Noise Testing on Airbus Landing Gears in the German-Dutch Wind Tunnel. In: 3rd AIAA/CEAS Aeroacoustics Conference, Atlanta/GA, USA, 12.-14.5.1997, Paper-No. AIAA/CEAS 97-1597.
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The acoustic flyover signature of modern aircraft in their approach configuration - i.e. with slats, flaps and gears deployed - are often dominated by airframe noise contributions. To study relevant source and radiation characteristics, airframe noise tests were performed in the German-Dutch Wind Tunnel employing- for the first time ever - full-scale landing gears of an A320 aircraft. Farfield noise characteristics were determined for different gear configurations (starting form the base configuration and subsequently covering ever more gear elements with streamlined fairings) at wind speeds ranging from 40 to 78m/s. Aerodynamically generated noise from landing gears turnes out to be of broadband nature with constant levels (in 1/3-oct. bands) up to several kHz. One most essential result therefore is that landing gear noise, is not at all a "low-frequency phenomenon". Moreover, levels increase with the 6th power of flow velocity.
|Document Type:||Conference or Workshop Item (Paper)|
|Additional Information:||LIDO-Berichtsjahr=1997, pages=14,|
|Title:||Full-Scale Noise Testing on Airbus Landing Gears in the German-Dutch Wind Tunnel.|
|Journal or Publication Title:||3rd AIAA/CEAS Aeroacoustics Conference, Atlanta/GA, USA, 12.-14.5.1997, Paper-No. AIAA/CEAS 97-1597|
|Keywords:||Airframe Noise, Landing Gear Noise|
|HGF - Research field:||UNSPECIFIED|
|HGF - Program:||Aeronautics|
|HGF - Program Themes:||L - no assignement|
|DLR - Research area:||UNSPECIFIED|
|DLR - Program:||L ST - Starrflüglertechnologien|
|DLR - Research theme (Project):||L - Quiet Air Traffic (old)|
|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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