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Numerical Investigation of the Basis Mechanisms of BVI-Noise Generation

Ehrenfried, K. and Meier, G.E.A. (1993) Numerical Investigation of the Basis Mechanisms of BVI-Noise Generation. Proceedings of the Nineteenth European Rotorcraft Forum, Como, Italy, Sept. 14-16, 1993, Vol. 1, Paper No. B9.

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Abstract

Two-dimensional vortex-airfoil interactions are investigated numerically by solving the unsteady Euler equations using a finite- volume scheme. The computational domain is extended up to 10 cord length away from the airfoil and non-reflecting conditions are applied at the outer boundary. This allows to investigate the propagation of the generated sound waves and the determination in which directions the strongest waves are emitted. The calculations yield a direct connection between the processes directly at the airfoil and the form of the emitted sound waves. The influence of the airfoil geometry and other parameters on these wave forms is discussed.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=1993,
Title:Numerical Investigation of the Basis Mechanisms of BVI-Noise Generation
Authors:
AuthorsInstitution or Email of Authors
Ehrenfried, K.UNSPECIFIED
Meier, G.E.A.UNSPECIFIED
Date:1993
Status:Published
Keywords:Blade Vortex Interaction, Helicopter Noise, Rotor Noise
Event Title:Proceedings of the Nineteenth European Rotorcraft Forum, Como, Italy, Sept. 14-16, 1993, Vol. 1, Paper No. B9
HGF - Research field:UNSPECIFIED
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:UNSPECIFIED
DLR - Program:L DT - Drehflüglertechnologien
DLR - Research theme (Project):UNSPECIFIED
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Institut für Strömungsmechanik > Institut für Experimentelle Strömungsmechanik
Deposited By: elib DLR-Beauftragter
Deposited On:03 Apr 2006
Last Modified:27 Apr 2009 10:07

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