elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

A Numerical Study on Aerodynamic Resonance Phenomena in Transonic Airfoil Flow

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).

[img] PDF - Only accessible within DLR
485kB

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/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:A Numerical Study on Aerodynamic Resonance Phenomena in Transonic Airfoil Flow
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Nitzsche, JensUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Brouwers, KjellFaculty of Aerospace Engineering, Technical University of DelftUNSPECIFIEDUNSPECIFIED
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

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Website and database design: Copyright © German Aerospace Center (DLR). All rights reserved.