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Application potential of advanced PIV algorithms for industrial applications

Willert, Christian (2004) Application potential of advanced PIV algorithms for industrial applications. In: Proceedings of the Workshop on Applications of Particle Image Velocimetry to Naval and Industrial Hydrodynamics. INSEAN. PIVNET2 Workshop on Applications of Particle Image Velocimetry to Naval and Industrial Hydrodynamics, 2004-05-05 - 2005-05-06, Rome (Italy).

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Kurzfassung

Parallel to the increased use of particle image velocimetry in applied research and development, the need for robust processing algorithms capable of reliably tackling an ever increasing spectrum of applications arises. The investigated flows are frequently dominated by high shear rates and/or strong vortices with a high spatial and temporal variation. Traditional PIV processing algorithms relying on a spot-by-spot analysis of the images frequently fall short of recovering the flow field at the spatial resolution offered by the original PIV recording. More advanced algorithms – frequently also referred to as second-order accurate methods – rely on a pyramid-based grid refinement strategy to increase spatial resolution. At the same time iterative deformation schemes are applied to the images to increase the matching efficiency of the correlation-based PIV technique. Whilst the deformation schemes can be applied locally using an interrogation spot at time, the technique of global image deformation based on displacement estimates of prior interrogation passes has proven to be both efficient and highly reliable for a wide range of applications. The presentation will give an overview of a PIV algorithm utilizing these advanced concepts that has been in use at DLR over the past year. Its performance gain in comparison to traditional algorithms will be illustrated using several examples of recent PIV measurements. Estimates concerning the algorithm’s increased processing-cost, its convergence and stability, as well as a few important implementation specific issues are also given.

Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Application potential of advanced PIV algorithms for industrial applications
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Willert, ChristianNICHT SPEZIFIZIERT
Datum:Mai 2004
Erschienen in:Proceedings of the Workshop on Applications of Particle Image Velocimetry to Naval and Industrial Hydrodynamics
Referierte Publikation:Nein
In ISI Web of Science:Nein
Herausgeber:
HerausgeberInstitution und/oder E-Mail-Adresse der Herausgeber
Di Felice, FabioNICHT SPEZIFIZIERT
Pereira, FranciscoNICHT SPEZIFIZIERT
Verlag:INSEAN
Status:veröffentlicht
Stichwörter:particle image velocimetry, PIV, algorithms, data processing
Veranstaltungstitel:PIVNET2 Workshop on Applications of Particle Image Velocimetry to Naval and Industrial Hydrodynamics
Veranstaltungsort:Rome (Italy)
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:2004-05-05 - 2005-05-06
Veranstalter :INSEAN
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Antriebe
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L ER - Antriebsforschung
DLR - Teilgebiet (Projekt, Vorhaben):L - Virtuelles Triebwerk und Validierungsmethoden
Standort: Köln-Porz
Institute & Einrichtungen:Institut für Antriebstechnik > Triebwerksmesstechnik
Hinterlegt von: Dr.phil. Christian Willert
Hinterlegt am:06 Feb 2006
Letzte Änderung:12 Dez 2013 20:10

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