Mommert, Michael und Schiepel, Daniel und Schmeling, Daniel und Wagner, Claus (2019) A flow-intrinsic trigger for capturing reconfigurations in buoyancy-driven flows in automated PIV. Measurement Science and Technology, 30 (4), 045301. Institute of Physics (IOP) Publishing. doi: 10.1088/1361-6501/ab0619. ISSN 0957-0233.
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Offizielle URL: https://iopscience.iop.org/article/10.1088/1361-6501/ab0619
Kurzfassung
In order to acquire flow fields of rare reconfiguration events in buoyancy-driven flows, an automated flow-intrinsic trigger method for 3D particle image velocimetry (PIV) was developed. The trigger condition for initiating PIV is based on continuous multi-probe temperature measurements. The autonomously started PIV was realized with LED illumination and a controlled helium-filled soap bubble generator. The measured velocity fields reveal the transition between two different flow states in a mixed convection sample as proof of concept for this method. It is further proposed to consider the time series of all temperature probes for the trigger condition using Proper Orthogonal Decomposition (POD). It is demonstrated that the use of this POD-based trigger condition allows to detect flow events much earlier than the trigger based on single raw temperature signals.
elib-URL des Eintrags: | https://elib.dlr.de/122315/ | ||||||||||||||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||||||
Titel: | A flow-intrinsic trigger for capturing reconfigurations in buoyancy-driven flows in automated PIV | ||||||||||||||||||||
Autoren: |
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Datum: | 1 März 2019 | ||||||||||||||||||||
Erschienen in: | Measurement Science and Technology | ||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||
Open Access: | Ja | ||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||||||
In ISI Web of Science: | Ja | ||||||||||||||||||||
Band: | 30 | ||||||||||||||||||||
DOI: | 10.1088/1361-6501/ab0619 | ||||||||||||||||||||
Seitenbereich: | 045301 | ||||||||||||||||||||
Verlag: | Institute of Physics (IOP) Publishing | ||||||||||||||||||||
ISSN: | 0957-0233 | ||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||
Stichwörter: | conditional trigger, PIV, rare flow events, automated measurement, buoyancy-driven flows | ||||||||||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||||||
HGF - Programm: | Verkehr | ||||||||||||||||||||
HGF - Programmthema: | Bodengebundener Verkehr (alt) | ||||||||||||||||||||
DLR - Schwerpunkt: | Verkehr | ||||||||||||||||||||
DLR - Forschungsgebiet: | V BF - Bodengebundene Fahrzeuge | ||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | V - Next Generation Train III (alt) | ||||||||||||||||||||
Standort: | Göttingen | ||||||||||||||||||||
Institute & Einrichtungen: | Institut für Aerodynamik und Strömungstechnik > Bodengebundene Fahrzeuge | ||||||||||||||||||||
Hinterlegt von: | Mommert, Michael | ||||||||||||||||||||
Hinterlegt am: | 11 Mär 2019 13:57 | ||||||||||||||||||||
Letzte Änderung: | 22 Nov 2023 06:37 |
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