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Multi-Exposed recordings for 3D Lagrangian particle tracking in turbulent boundary layer flows by means of Multi-Pulse Shake-The-Box

Novara, Matteo und Schanz, Daniel und Geisler, Reinhard und Voß, Christina und Schröder, Andreas (2018) Multi-Exposed recordings for 3D Lagrangian particle tracking in turbulent boundary layer flows by means of Multi-Pulse Shake-The-Box. In: 19th International Symposium on the Application of Laser and Imaging Techniques to Fluid Mechanics (176), Seiten 1-16. 19th International Symposium on the Application of Laser and Imaging Techniques to Fluid Mechanics, 2018-07-16 - 2018-07-19, Lissabon, Portugal.

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Offizielle URL: http://www.lisbon-lasersymposium.org/site/programme/?trackid=0&catId=0#!

Kurzfassung

The Shake-The-Box (STB) is a processing algorithm for particle images recorded by means of 3D imaging systems, which enables volumetric Lagrangian particle tracking (LPT) at relatively high seeding densities. The method delivers the accurate measurement of position, velocity and acceleration of individual tracers and, coupled with regularization techniques, provides access to the full velocity gradient tensor. The STB technique, initially proposed for the reconstruction of time-resolved sequences of recordings, has been extended to the case of short recording sequences acquired by multi-pulse systems for the investigation of high-speed flows. The Multi-Pulse Shake-TheBox technique (MP-STB) exploits an iterative strategy to make up for the lack of time-resolved recordings and progressively simplify the reconstruction and tracking problem, therefore increasing the number of successfully identified particle tracks. Several strategies can be adopted to acquire multi-pulse recordings suitable for MP-STB; typically, a dual imaging system is used with the aim of separating the particle images from subsequent laser pulses onto individual camera frames. In the present study the use of multi-exposed recordings is proposed which employs a single imaging system, largely reducing the complexity of the experimental setup at the cost of an increase in the perceived seeding density. The MP-STB technique is applied here to experimental results from the investigation of boundary layer flows in air at speeds ranging from 15 to 35 m/s; results, presented in terms of instantaneous tracks and flow structures, suggest the suitability of the proposed multi-exposed strategy for carrying out 3D Lagrangian particle tracking with MP-STB in high-speed flows.

elib-URL des Eintrags:https://elib.dlr.de/122306/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Multi-Exposed recordings for 3D Lagrangian particle tracking in turbulent boundary layer flows by means of Multi-Pulse Shake-The-Box
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Novara, Matteomatteo.novara (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Schanz, Danieldaniel.schanz (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Geisler, Reinhardreinhard.geisler (at) dlr.dehttps://orcid.org/0009-0006-8838-3713NICHT SPEZIFIZIERT
Voß, Christinachristina.voss (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Schröder, Andreasandreas.schroeder (at) dlr.dehttps://orcid.org/0000-0002-6971-9262NICHT SPEZIFIZIERT
Datum:2018
Erschienen in:19th International Symposium on the Application of Laser and Imaging Techniques to Fluid Mechanics
Referierte Publikation:Ja
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Seitenbereich:Seiten 1-16
Name der Reihe:Conference proceedings online
Status:veröffentlicht
Stichwörter:Lagrangian, 3D particle tracking, multi-pulse, Shake-The-Box, boundary layers
Veranstaltungstitel:19th International Symposium on the Application of Laser and Imaging Techniques to Fluid Mechanics
Veranstaltungsort:Lissabon, Portugal
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:16 Juli 2018
Veranstaltungsende:19 Juli 2018
Institution:Deutsches Zentrum für Luft- und Raumfahrt e.V.
Abteilung:AS-EXV
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Flugzeuge
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AR - Aircraft Research
DLR - Teilgebiet (Projekt, Vorhaben):L - VicToria (alt)
Standort: Göttingen
Institute & Einrichtungen:Institut für Aerodynamik und Strömungstechnik > Experimentelle Verfahren, GO
Institut für Aerodynamik und Strömungstechnik > Hochgeschwindigkeitskonfigurationen, GO
Hinterlegt von: Micknaus, Ilka
Hinterlegt am:10 Jan 2019 13:03
Letzte Änderung:24 Apr 2024 20:26

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