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Flow Field Investigations on the SACCON Configuration in Stationary and Pitching Mode by Means of Particle Image Velocimetry

Konrath, Robert and Roosenboom, Eric and Schröder, Andreas and Pallek, Dieter and Otter, Dirk (2011) Flow Field Investigations on the SACCON Configuration in Stationary and Pitching Mode by Means of Particle Image Velocimetry. Assessment of Stability and Control, 12. - 14. Oct. 2011, Portsdown, United Kingdom.

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Abstract

Three-dimensional flow field measurements above a stationary and pitching Unmanned Combat Air Vehicle (UCAV) model are performed applying Stereo Particle Image Velocimetry (PIV). The tests took place in the low speed wind tunnel DNW-NWB on a SACCON (Stability And Control CONfiguration) wind tunnel model of NASA. Pitching model motions were applied using a model positioning system of the wind tunnel. This enabled also measurements in several cross planes by moving the model within the test section while keeping the light-sheet and cameras of the Stereo-PIV arrangement stationary. The obtained flow velocity and vorticity distributions are used to analyse the 3D flow topology at static conditions between chord positions of x/c = 0.45 and 0.85 for seven angles of attack between 14° and 19°. The flow dynamic development for a pitching frequency of 1 Hz and two different pitch amplitudes of ±2.5° and ±5° are also discussed at x/c = 0.7 for 8 phase positions, comparing the vortical flow structures with the static results. A hysteresis in the development of the vortices is determined by calculating the circulation strengths of individual vortices.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Flow Field Investigations on the SACCON Configuration in Stationary and Pitching Mode by Means of Particle Image Velocimetry
Authors:
AuthorsInstitution or Email of Authors
Konrath, RobertUNSPECIFIED
Roosenboom, EricUNSPECIFIED
Schröder, AndreasUNSPECIFIED
Pallek, DieterUNSPECIFIED
Otter, DirkUNSPECIFIED
Date:2011
Refereed publication:No
In SCOPUS:No
In ISI Web of Science:No
Series Name:Conference Proceedings
Status:Published
Keywords: Stereo Particle Image Velocimetry (PIV), Unmanned Combat Air Vehicle (UCAV), 3D flow topology
Event Title:Assessment of Stability and Control
Event Location:Portsdown, United Kingdom
Event Type:international Conference
Event Dates:12. - 14. Oct. 2011
Organizer:NORTH ATLANTIC TREATY ORGANISATION
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Flight Physics
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Experimental Methods
Deposited By: Ilka Micknaus
Deposited On:17 Jan 2012 12:11
Last Modified:17 Jan 2012 12:11

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