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A numerical study on aerodynamic resonance in transonic separated flow

Nitzsche, Jens (2009) A numerical study on aerodynamic resonance in transonic separated flow. IFASD 2009 - International Forum on Aeroelasticity and Structural Dynamics, 21-25 June 2009, Seattle, WA (USA).

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Abstract

An ongoing numerical investigation of unsteady shock/boundary layer interaction on a 2-d supercritical airfoil in transonic flow is presented. Initially, the finitevolume URANS solver DLR-TAU is used to simulate 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 the flow is perturbed in time with small sinusoidal deflections of the airfoil geometry and random impulses. With increasing angle of attack the mean 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/61964/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:A numerical study on aerodynamic resonance in transonic separated flow
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Nitzsche, JensUNSPECIFIEDUNSPECIFIED
Date:2009
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:transonic flow, stability, aerodynamic resonance, shock buffet, aileron buzz
Event Title:IFASD 2009 - International Forum on Aeroelasticity and Structural Dynamics
Event Location:Seattle, WA (USA)
Event Type:international Conference
Event Dates:21-25 June 2009
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:21 Jan 2010 11:08
Last Modified:31 Jul 2019 19:26

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