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Investigation of unsteady flow development over a pitching airfoil by means of TR-PIV

Mulleners, Karen and Henning, Arne and Mai, Holger and Raffel, Markus and Costes, Michel and Le Pape, Arnaud (2009) Investigation of unsteady flow development over a pitching airfoil by means of TR-PIV. 27th AIAA Applied Aerodynamics, 2009-06-22 - 2009-06-25, San Antonio, Texas.

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Official URL: http://www.aiaa.org

Abstract

The flow over an OA209 airfoil subjected to a sinusoidal pitching motion under dynamic stall conditions is investigated experimentally by means of time resolved particle image velocimetry (TR-PIV) and surface pressure measurements. Dynamic stall is distinguished by the formation and convection of large scale coherent structures and a delay in massive flow separation. A vortex detection scheme based on an identification function derived directly from the velocity fields is adopted to identify vortex cores. The combination of global time resolved imaging and an automated vortex identification algorithm allows for the investigation of the spatial and temporal evolution of vortical structures within a single oscillation. Furthermore, the mechanisms associated with the dynamic stall delay are considered.

Item URL in elib:https://elib.dlr.de/55996/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Investigation of unsteady flow development over a pitching airfoil by means of TR-PIV
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Mulleners, KarenUNSPECIFIEDUNSPECIFIED
Henning, ArneUNSPECIFIEDUNSPECIFIED
Mai, HolgerUNSPECIFIEDUNSPECIFIED
Raffel, MarkusUNSPECIFIEDUNSPECIFIED
Costes, MichelONERAUNSPECIFIED
Le Pape, ArnaudONERAUNSPECIFIED
Date:2009
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Series Name:Conference Proceedings
Status:Published
Keywords:dynamic stall, TR-PIV, vortex detection, flow separation, pitching airfoil
Event Title:27th AIAA Applied Aerodynamics
Event Location:San Antonio, Texas
Event Type:international Conference
Event Dates:2009-06-22 - 2009-06-25
Organizer:AIAA
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L - no assignment
DLR - Research theme (Project):L - no assignment (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Helicopters
Institute of Aerodynamics and Flow Technology > Experimental Methods
Institute of Aeroelasticity
Deposited By: Mulleners, Karen
Deposited On:26 Nov 2009 15:14
Last Modified:31 Jul 2019 19:23

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