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Time Resolved Flow Field Investigations of Low Reynolds number Transient Maneuvers

Ehlers, Hauke and Konrath, Robert and Börner, Marcel and Wokoeck, Ralf and Radespiel, Rolf (2016) Time Resolved Flow Field Investigations of Low Reynolds number Transient Maneuvers. AIAA Aerospace Sciences Meeting, 04. - 08. Jan. 2016, San Diego, California, USA. doi: 10.2514/6.2016-1076.

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Official URL: http://dx.doi.org/10.2514/6.2016-1076


Transient pitch and plunge maneuvers of low aspect ratio wings in a special low Reynolds number wind tunnel have been investigated by means of high speed Particle Image Velocimetry to analyze the leading edge vortex dynamics quantitatively. A specific requirement of the measurement was to design and apply an optical arrangement for the laser light sheet which moves with the wing so as to keep the light sheet in fixed position on the upper side of the model. This became necessary because of the low pulse energy of high speed lasers and the large amplitudes of motion. This paper shows the principle and the implementation of this particular set-up. The evaluation procedure shows some specific steps concerning the preprocessing, for example, mask generation and disparity correction. The temporally-resolved data sets enable a tracking of vortices and a detailed analysis of the leading edge vortex dynamics in terms of circulation build-up and convection velocity.

Item URL in elib:https://elib.dlr.de/96469/
Document Type:Conference or Workshop Item (Speech)
Additional Information:AIAA 2016-1076
Title:Time Resolved Flow Field Investigations of Low Reynolds number Transient Maneuvers
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Börner, MarcelTU MünchenUNSPECIFIED
Wokoeck, RalfTechnische Universität Braunschweig, Institut für StrömungsmechanikUNSPECIFIED
Radespiel, RolfTU BraunschweigUNSPECIFIED
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 1-13
Series Name:Conference Proceedings online
Keywords:low Reynolds number, instantaneous, transient maneuver, pitch, plunge, MAV, HS-PIV
Event Title:AIAA Aerospace Sciences Meeting
Event Location:San Diego, California, USA
Event Type:international Conference
Event Dates:04. - 08. Jan. 2016
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation and Validation (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Experimental Methods
Deposited By: Micknaus, Ilka
Deposited On:12 May 2016 15:46
Last Modified:12 May 2016 15:46

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