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Helicopter Rotor Blade Aeroacoustics: A Comparison of Model-scale Wind Tunnel and Full-scale Flight Test Results

Heller, H. and Buchholz, H. and Schultz, K.-J. and Ahmed, S.R. and Splettstößer, W. (1996) Helicopter Rotor Blade Aeroacoustics: A Comparison of Model-scale Wind Tunnel and Full-scale Flight Test Results. In: Proc. 20th ICAS Congress, Sorrent/Italien, 8.-13.9.1996..

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Abstract

Several major international-cooperative rotor-aeroacoustic research programmes have been conducted during the past decade, employing a 40% geometrically and dynamically scaled model of the main rotor of an ECD (MBB respectively) helicopter BO-105, most notably the European Brite/Euram HELINOISE project and the European/US HART-project. Among several other objectives, these projects served to simultaneous determine unsteady blade surface pressures and the resulting acoustic radiation and to provide a comprehensive data bench. A wealth of information was obtained to be used for both validating and furthering rotor noise prediction schemes but also to devise means to reduce noise at the source. Although the model scaling factor was large (namely 0.4) thus implying a good scalability towards the full-scale condition, the final proof was still lacking, in that no comparable aeroacoustics information form the full-scale.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=1996, pages=17,
Title:Helicopter Rotor Blade Aeroacoustics: A Comparison of Model-scale Wind Tunnel and Full-scale Flight Test Results
Authors:
AuthorsInstitution or Email of Authors
Heller, H.UNSPECIFIED
Buchholz, H.UNSPECIFIED
Schultz, K.-J.UNSPECIFIED
Ahmed, S.R.UNSPECIFIED
Splettstößer, W.UNSPECIFIED
Date:1996
Journal or Publication Title:Proc. 20th ICAS Congress, Sorrent/Italien, 8.-13.9.1996.
Series Name:Paper ICAS-96-1.8.1
Status:Published
Keywords:Helicopter Noise, Rotor Noise, Acoustic Flight Testing, Blade Pressures
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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