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Lagrangian 3D particle tracking in high-speed flows:Shake-The-Box for multi-pulse systems

Novara, Matteo and Schanz, Daniel and Reuther, Nico and Kähler, Christian J. and Schröder, Andreas (2016) Lagrangian 3D particle tracking in high-speed flows:Shake-The-Box for multi-pulse systems. Experiments in Fluids, 57 (8), pp. 1-20. Springer. DOI: 10.1007/s00348-016-2216-7 ISSN 0723-4864

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Official URL: http://link.springer.com/article/10.1007/s00348-016-2216-7


The Shake The Box (STB) particle tracking technique, recently introduced for time resolved 3D particle image velocimetry (PIV) images, is applied here to data from a multipulse investigation of a turbulent boundary layer flow with adverse pressure gradient in air at 36 m/s (Reτ = 10,650). The multipulse acquisition strategy allows for the recording of four pulse long timeresolved sequences with a time separation of a few microseconds. The experimental setup consists of a dualimaging System and a dualdoublecavity laser emitting orthogonal polarization directions to separate the four pulses. The STB particle triangulation and tracking strategy is adapted here to cope with the limited amount of realizations available along the time sequence and to take advantage of the ghost track reduction offered by the use of two independent imaging systems. Furthermore, a correction scheme to compensate for camera vibrations is discussed, together with a method to accurately identify the position of the wall within the measurement domain. Results show that approximately 80,000 tracks can be instantaneously reconstructed within the measurement volume, enabling the evaluation of both dense velocity fields, suitable for spatial gradients evaluation, and highly spatially resolved boundary layer profiles. Turbulent boundary layer profiles obtained from ensemble averaging of the STB tracks are compared to results from 2DPIV and longrange micro particle tracking velocimetry; the comparison shows the capability of the STB approach in delivering accurate results across a wide range of scales.

Item URL in elib:https://elib.dlr.de/106075/
Document Type:Article
Additional Information:Published online: 23. July 2016, Article:128, ISSN: 0723-4864 (Print) 1432-1114 (Online)
Title:Lagrangian 3D particle tracking in high-speed flows:Shake-The-Box for multi-pulse systems
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Novara, Matteomatteo.novara (at) dlr.deUNSPECIFIED
Schanz, Danieldaniel.schanz (at) dlr.deUNSPECIFIED
Reuther, NicoNico.Reuther (at) unibw.deUNSPECIFIED
Kähler, Christian J.UniBW MünchenUNSPECIFIED
Schröder, Andreasandreas.schroeder (at) dlr.deUNSPECIFIED
Journal or Publication Title:Experiments in Fluids
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1007/s00348-016-2216-7
Page Range:pp. 1-20
Keywords:ShakeTheBox (STB), particleimage velocimetry (PIV),3D crosscorrelation
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: Bachmann, Barbara
Deposited On:21 Oct 2016 14:03
Last Modified:06 Sep 2019 15:25

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