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Shake-The-Box for multi-pulse tomographic systems: towards high seeding density particle tracking in high speed flows

Novara, Matteo and Schanz, Daniel and Kähler, Christian and Schröder, Andreas (2015) Shake-The-Box for multi-pulse tomographic systems: towards high seeding density particle tracking in high speed flows. 11th International Symposium on Particle Image Velocimetry - PIV15 -, 14. - 16. Sept. 2015, Santa Barbara, CA, USA.

Full text not available from this repository.

Official URL: http://www.piv2015.org/

Abstract

A turbulent boundary layer flow with adverse pressure gradient in air at 36 m/s is investigated by means of a multi-pulse tomographic system. The acquisition strategy allows for the recording of short time-resolved sequences using four pulses with a time separation of a few microseconds. The experimental setup consists of a dual-imaging system and a dual-double cavity laser emitting orthogonal polarization directions to separate the four pulses. The Shake-The-Box 3D particle tracking technique, recently introduced for time-resolved investigations, is applied to the multi-pulse data. The iterative particle tracking strategy is investigated in the present study; the processing approach takes advantage of the ghost-free tracking possibility offered by the use of the dual-imaging system. Furthermore, a correction scheme to compensate for the vibrations between the two independent imaging systems is discussed, together with a method to accurately identify the position of the wall within the measurement domain. Results show that approximately 70,000÷80,00 tracks can be reconstructed in the measurement volume, enabling the evaluation of highly spatially resolved boundary layer profiles and dense velocity fields suitable for spatial gradients evaluation.

Item URL in elib:https://elib.dlr.de/96118/
Document Type:Conference or Workshop Item (Speech)
Title:Shake-The-Box for multi-pulse tomographic systems: towards high seeding density particle tracking in high speed flows
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Novara, Matteomatteo.novara (at) dlr.deUNSPECIFIED
Schanz, Danieldaniel.schanz (at) dlr.deUNSPECIFIED
Kähler, ChristianUni BW MünchenUNSPECIFIED
Schröder, Andreasandreas.schroeder (at) dlr.deUNSPECIFIED
Date:2015
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 1-16
Series Name:Conference Proceedings on USB-stick
Status:Published
Keywords:Shake-the-Box, multi pulse, tomographic PIV, high speed, boundary layer, adverse pressure gradient
Event Title:11th International Symposium on Particle Image Velocimetry - PIV15 -
Event Location:Santa Barbara, CA, USA
Event Type:international Conference
Event Dates:14. - 16. Sept. 2015
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:29 Sep 2015 14:43
Last Modified:29 Sep 2015 14:43

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