elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Contact | Deutsch
Fontsize: [-] Text [+]

The German National Program on Airframe Noise Reduction - Pertinent Wind Tunnel Experiments on Source Identification and Airframe Noise Reduction of Wing High Lift Configurations

Dobrzynski, W. (1999) The German National Program on Airframe Noise Reduction - Pertinent Wind Tunnel Experiments on Source Identification and Airframe Noise Reduction of Wing High Lift Configurations. AAAF-DGLR Symposium, Saint-Louis (fr), 21.-22. 01.1999.

Full text not available from this repository.

Abstract

The development of low-noise high-bypass-ratio engines to power modern large commercial aircraft caused airframe noise levels for the aircraft in its approach configuration to be compatible to those of the engines. As a consequence,noise from aircraft components deployed during the final approach leg, such as landing gears and high-lift devices (HLD) on wings will become ever more important. In view of European aviation industry to design and build a very large commercial aeroplane, a predominantly experimental study on wing configurations with deployed high-lift devices was initiated to identify and rank order sources and describe relevant airframe noise mechanisms, develop and assess airframe noise control measures and develop or improve airframe noise prediction methods. One essential outcome of this German national research programme will be a number of proposals for low airframe-noise configurations specified for different airframe components (such as slats, flaps, wing-tips, etc.). At the same time a better understanding of noise mechanisms is expected, leading to improved prediction capabilities. In this paper results of the scale-model experiments in the Aeroacoustic Wind Tunnel Braunschweig are presented as well as initial results from noise testing on a 1:7.5 scaled full aircraft in the DNW.

Document Type:Conference or Workshop Item (Speech)
Additional Information: LIDO-Berichtsjahr=1999,
Title:The German National Program on Airframe Noise Reduction - Pertinent Wind Tunnel Experiments on Source Identification and Airframe Noise Reduction of Wing High Lift Configurations
Authors:
AuthorsInstitution or Email of Authors
Dobrzynski, W.UNSPECIFIED
Date:1999
Status:Published
Keywords:Airframe Noise, High Lift Devices
Event Title:AAAF-DGLR Symposium, Saint-Louis (fr), 21.-22. 01.1999
Organizer:ISL
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 > Institut für Entwurfsaerodynamik
Deposited By: Claudia Grant
Deposited On:16 Sep 2005
Last Modified:14 Jan 2010 20:02

Repository Staff Only: item control page

Browse
Search
Help & Contact
Informationen
electronic library is running on EPrints 3.3.12
Copyright © 2008-2012 German Aerospace Center (DLR). All rights reserved.