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Simulating the Interaction of a Three-Dimensional Vortex with Airfoils Using CAA

Grogger, H.A. and Lummer, M. and Lauke, T. (2001) Simulating the Interaction of a Three-Dimensional Vortex with Airfoils Using CAA. In: CD-Proceedings. 7th AIAA/CEAS Aeroacoustics Conference, Maastricht (nl), 28.-30.05.2001.

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Abstract

The noise generated by the interaction of localized three-dimensional vorticity with the leading edge of Joukowski-type airfoils is calculated numerically. As governing equations the linearized Euler-equations are solved in curvilinear coordinates. For spatial discretization the well known DRP-scheme is used and for time marching the classical explicit 4th order Runge-Kutta scheme is employed. The mean-flow is pre-calculated analytically. Calculations are performed for three-dimensional vorticity spots striking the leading edge of the airfoil. The influence of the principal fluctuation component on noise generation is assessed by different rotational axes of the vorticity. The investigated airfoils have a thickness of 6, 12 and 18%. As limiting case the simulations are also performed for an infinite thin flat plate. Directivity patterns are evaluated and compared.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=2002, monograph_id=Paper 2001-2137,
Title:Simulating the Interaction of a Three-Dimensional Vortex with Airfoils Using CAA
Authors:
AuthorsInstitution or Email of Authors
Grogger, H.A.UNSPECIFIED
Lummer, M.UNSPECIFIED
Lauke, T.UNSPECIFIED
Date:2001
Journal or Publication Title:CD-Proceedings
Status:Published
Keywords:leading edge, Joukowski-type airfoils, linearized Euler-equations, curvilinear coordinates, DRP-scheme, explicit 4th order Runge-Kutta scheme, pre-calculated mean-flow, infinite thin flat plate, directivity patterns
Event Title:7th AIAA/CEAS Aeroacoustics Conference, Maastricht (nl), 28.-30.05.2001
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
Deposited By: Claudia Grant
Deposited On:31 Jan 2006
Last Modified:14 Jan 2010 18:59

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