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Time-resolved tomographic PIV investigation of turbulent flow control by vortex generators on a backward-facing step

Ma, Xingyu and Geisler, Reinhard and Agocs, Janos and Schröder, Andreas (2014) Time-resolved tomographic PIV investigation of turbulent flow control by vortex generators on a backward-facing step. 17th International Symposium on Applications of Laser Techniques to Fluid Mechanics, 07. - 10. July, 2014, Lisbon, Portugal.

Full text not available from this repository.

Official URL: http://ltces.dem.ist.utl.pt/lxlaser/lxlaser2014/finalworks2014/papers/01.15_3_163paper.pdf

Abstract

An experimental study is presented for turbulent flow control in backward-facing step (BFS) flow by time-resolved tomographic particle image velocimetry (TR tomo-PIV) and high-resolution 2D-2C- PIV. Vortex generators were designed and implemented on a BFS with a zero pressure gradient. As passive flow control devices, the vortex generators were wedge-shaped, backward oriented, and transversely mounted upstream of the step. The experiments were carried out in the 1-m low speed wind tunnel at DLR in Göttingen, Germany. The Reynolds number was Reh = 2.0×10^4, based on the free stream velocity U∞ = 10 m/s and the step height h = 30 mm. TR tomo-PIV was employed to measure the separated shear layer flow within a measurement volume of 50×60×10 mm^3 in x-, y- and z-direction respectively, which located right behind the step and above the plate. Four high-speed CMOS cameras were mounted under the glass plate in a pyramidal arrangement and recorded image pairs up to 1 kHz. The measurement volume was illuminated by transverse laser light beam which was reflected back and forth between two mirrors on both sides of the flow to increase the light intensity.

Item URL in elib:https://elib.dlr.de/89115/
Document Type:Conference or Workshop Item (Speech)
Additional Information:Paper-Nr: 01.15_3_163
Title:Time-resolved tomographic PIV investigation of turbulent flow control by vortex generators on a backward-facing step
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Ma, XingyuUNSPECIFIEDUNSPECIFIED
Geisler, Reinhardreinhard.geisler (at) dlr.deUNSPECIFIED
Agocs, Janosjanos.agocs (at) dlr.deUNSPECIFIED
Schröder, Andreasandreas.schroeder (at) dlr.deUNSPECIFIED
Date:2014
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 1-18
Series Name:Conference Proceedings online
Status:Published
Keywords:tomographic PIV, turbulent flow control, cross-correlation, Proper Orthogonal Decomposition (POD), high-resolution 2D-2C- PIV
Event Title:17th International Symposium on Applications of Laser Techniques to Fluid Mechanics
Event Location:Lisbon, Portugal
Event Type:international Conference
Event Dates:07. - 10. July, 2014
Organizer:17th International Symposium on Applications of Laser Techniques to Fluid Mechanics
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
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Experimental Methods
Deposited By: Micknaus, Ilka
Deposited On:30 Jul 2014 17:01
Last Modified:20 Oct 2014 16:58

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