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Into the Physics of Rotor Aeroacoustics - Highlights of recent European Helicopter Noise Research

Heller, H. (1997) Into the Physics of Rotor Aeroacoustics - Highlights of recent European Helicopter Noise Research. In: Proceedings 5th International Congress on Sound and Vibration, University of Adelaide, South Australia, 15.-18.12.97........., Vol. 1, pp. 59-101.

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Abstract

Significant advances in understanding and controlling helicopter noise have been made in the course of several major European dedicated rotor aeroacoustics research projects over the past five, or so, years. The availability of the German Dutch Wind Tunnel (DNW), in particular, has enabled research on relatively large main rotor models (up to typically 40% full-scale). Here, the simultaneous application and use of blade-mounted absolute pressure sensors to probe into the very aeroacoustic source mechanisms, of advanced aoustic data acquisition systems for the radiated noise, of sophisticated flow visualisation and flow measurement techniques (such as the Laser Light Sheet and the Laser Doppler Velocimetry techniques) as well as of the Projected Grid method (a simplified Moir technique) to study the complex interrelationship of rotor aerodynamics and blade dynamic response, has provided much insight into the physics of rotor aeroaoustics. In an effort towards.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=1997,
Title:Into the Physics of Rotor Aeroacoustics - Highlights of recent European Helicopter Noise Research
Authors:
AuthorsInstitution or Email of Authors
Heller, H.UNSPECIFIED
Date:1997
Journal or Publication Title:Proceedings 5th International Congress on Sound and Vibration, University of Adelaide, South Australia, 15.-18.12.97.........
Volume:Vol. 1
Page Range:pp. 59-101
Status:Published
Keywords:Aeroacoustics, rotor noise, testing techniques, rotor noise prediction, BRITE-EURAM helicopter noise projects
HGF - Research field:UNSPECIFIED
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:UNSPECIFIED
DLR - Program:L DT - Drehflüglertechnologien
DLR - Research theme (Project):L - The Quiet and Comfortable Rotorcraft
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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