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Aeroacoustic Research at DLR

Heller, H. (1999) Aeroacoustic Research at DLR. University of Aeronautics and Astronautics, Nanjing (prc), 06.04.1999.

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Abstract

DLR research in the area of aeroacoustics pertains to (1) the noise of helicopters, where experimental investigations on model of full-scale rotors are conducted to study the noise generation and radiation mechanisms of helicopter main- and tail rotors to further the understanding of the underlying physical mechanisms and to find technical means to reduce the noise, employing e.g. blade control techniques (higher harmonic control and individual blade control), as well as advanced rotor blade geometries. - Theoretical efforts pertain to the development and application of boundary element methodsfor blade-vortex interaction noise as well as to the combination of CFD and Kirchhoff-methods for high-speed impulsive noise. (2) airframe noise, i.e. the noise generated by deployed landing gears and wing high lift devices of subsonic jet-aircraft in the configuration for landing approach. Here, in the context of industrial contracts or specific national of European Programs, DLR investigates the underlying aeroacoustic source mechanisms and develops technical means to reduce the aerodynamically generated noise of such critical components. Efforts on developing Computational Aeroacoustics (CAA) methods to predict the noise from fowler flap side edges noise are conducted within a national project "SWING".

Document Type:Conference or Workshop Item (Speech)
Additional Information: LIDO-Berichtsjahr=1999,
Title:Aeroacoustic Research at DLR
Authors:
AuthorsInstitution or Email of Authors
Heller, H.UNSPECIFIED
Date:1999
Status:Published
Keywords:Aviation Noise, Airframe Noise, Landing Gear Noise, Aerodynamically induced Noise of Wing High Lift Devices, Helicopter Rotor Noise, Rotor Noise Control
Event Title:University of Aeronautics and Astronautics, Nanjing (prc), 06.04.1999
Organizer:Nanjing University
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 20:00

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