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Pitching Airfoil Boundary Layer Investigations

Raffel, Markus and Richard, Hugues and Richter, Kai and Bosbach, Johannes and Geißler, Wolfgang (2006) Pitching Airfoil Boundary Layer Investigations. In: ISFV 12 (Paper 5.2), pp. 1-8. 12th International Symposium on Flow Visualization, 2006-09-10 - 2006-09-14, Göttingen, Germany.

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Abstract

The present paper describes an experiment performed in a transonic wind tunnel facility where a new test section has been developed especially for the investigation of the unsteady flow above oscillating airfoils under dynamic stall conditions. Dynamic stall is characterized by the development, movement and shedding of one or more concentrated vortices on the airfoils upper surface. The hysteresis loops of lift-, drag- and pitching moment are highly influenced by these vortices. To understand the very complicated unsteady flow involved, a detailed knowledge of the instantaneous flow fields is of crucial importance. With the application of the described measuring techniques it is expected to gain more insight into the problem. Results from these tests are ready for comparison with numerical data.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Pitching Airfoil Boundary Layer Investigations
Authors:
AuthorsInstitution or Email of Authors
Raffel, MarkusUNSPECIFIED
Richard, HuguesUNSPECIFIED
Richter, KaiUNSPECIFIED
Bosbach, JohannesUNSPECIFIED
Geißler, WolfgangUNSPECIFIED
Date:2006
Journal or Publication Title:ISFV 12
Refereed publication:No
In ISI Web of Science:No
Page Range:pp. 1-8
Status:Published
Keywords:dynamic stall, pitching airfoil, boundary layer, PIV
Event Title:12th International Symposium on Flow Visualization
Event Location:Göttingen, Germany
Event Type:international Conference
Event Dates:2006-09-10 - 2006-09-14
Organizer:German Aerospace Center (DLR)
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Rotorcraft
DLR - Research area:Aeronautics
DLR - Program:L RR - Rotorcraft Research
DLR - Research theme (Project):L - The Virtual Aerodynamic Rotorcraft
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Helicopters
Institute of Aerodynamics and Flow Technology > High Speed Configurations
Deposited By: Elisabeth Winkels
Deposited On:05 Jul 2007
Last Modified:06 May 2013 09:58

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