Nitzsche, Jens and Brouwers, Kjell (2008) A Numerical Study on Aerodynamic Resonance Phenomena in Transonic Airfoil Flow. Deutscher Luft- und Raumfahrtkongress 2008, 2008-09-23 - 2008-09-25, Darmstadt, Deutschland (Europa).
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Abstract
We present preliminary results from an ongoing numerical investigation of unsteady shock/boundary layer interaction on a 2-d supercritical airfoil in transonic flow. Initially, DLR's time accurate flow solver TAU is used to demonstrate the ability of standard URANS methods to predict self-sustained periodic shock oscillations well known as shock buffet. Next, emphasis is put on the fixed-point stability of the steady flow field below the shock buffet onset. Therefore we perturb the flow in time with small harmonic deflections of the airfoil geometry and random noise impulses. With increasing angle of attack the steady flow is shown to develop a damped aerodynamic resonance, that degenerates finally towards self-amplification. The occurrence of the aerodynamic resonance is closely related to the development of shock-induced separation, accompanied by quasi-steady inverse shock motion.
Item URL in elib: | https://elib.dlr.de/56118/ | ||||||||||||
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Document Type: | Conference or Workshop Item (Speech, Paper) | ||||||||||||
Title: | A Numerical Study on Aerodynamic Resonance Phenomena in Transonic Airfoil Flow | ||||||||||||
Authors: |
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Date: | 2008 | ||||||||||||
Refereed publication: | No | ||||||||||||
Open Access: | No | ||||||||||||
Gold Open Access: | No | ||||||||||||
In SCOPUS: | No | ||||||||||||
In ISI Web of Science: | No | ||||||||||||
Status: | Published | ||||||||||||
Keywords: | shock buffet, aerodynamic resonance, stability, unsteady aerodynamics | ||||||||||||
Event Title: | Deutscher Luft- und Raumfahrtkongress 2008 | ||||||||||||
Event Location: | Darmstadt, Deutschland (Europa) | ||||||||||||
Event Type: | national Conference | ||||||||||||
Event Start Date: | 23 September 2008 | ||||||||||||
Event End Date: | 25 September 2008 | ||||||||||||
Organizer: | Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V. (DGLR) | ||||||||||||
HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||
HGF - Program: | Aeronautics | ||||||||||||
HGF - Program Themes: | Aircraft Research (old) | ||||||||||||
DLR - Research area: | Aeronautics | ||||||||||||
DLR - Program: | L AR - Aircraft Research | ||||||||||||
DLR - Research theme (Project): | L - Flexible Aircraft (old) | ||||||||||||
Location: | Göttingen | ||||||||||||
Institutes and Institutions: | Institute of Aeroelasticity | ||||||||||||
Deposited By: | Erdmann, Daniela | ||||||||||||
Deposited On: | 14 Nov 2008 | ||||||||||||
Last Modified: | 24 Apr 2024 19:20 |
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