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Rotor Blade-Vortex Interaction Impulsive Noise Source Localization.

Splettstößer, W. and Schultz, K.-J. and Martin, R. (1) (1990) Rotor Blade-Vortex Interaction Impulsive Noise Source Localization. AIAA Journal 28 (1990) No. 4, pp. 593-600.

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An acoustic source localization scheme applicable to noncompact moving sources is developed and applied to the blade-vortex interaction (BVI) noise data of a 40 % scale BO-105 model rotor. A generalized rotor wake code is employed to predict possible BVI locations on the rotor disk and is found useful in interpreting the acoustic localization results. The highly varying directivity patterns of different BVI impulses generated at the same test condition is explained by both the localization results and predicted tip vortex trajectories. The effects of rotor tip-path-plane angle and advance ratio on the BVI source positions is studied. Decreasing tip-path-plane angle moves the general interaction region upwind on the rotor disk, significantly changing the interaction geometry. The region of strongest BVI sources lies between 60- and 70-deg azimuth and 80 and 90 % radius.

Document Type:Article
Additional Information: institution=AIAA, LIDO-Berichtsjahr=1990, pages=8,
Title:Rotor Blade-Vortex Interaction Impulsive Noise Source Localization.
AuthorsInstitution or Email of Authors
Splettstößer, W.UNSPECIFIED
Journal or Publication Title:AIAA Journal 28 (1990) No. 4
Refereed publication:Yes
In ISI Web of Science:Yes
Page Range:pp. 593-600
Series Name:4
Keywords:Rotor Noise Sources, Blade-Vortex Interaction (BVI) Impulsive Noise
HGF - Research field:UNSPECIFIED
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:UNSPECIFIED
DLR - Program:no assignment
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 10:04

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