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On the implementation of tomographic shadowgraphy for spray diagnostics

Klinner, Joachim und Willert, Christian (2011) On the implementation of tomographic shadowgraphy for spray diagnostics. 9TH INTERNATIONAL SYMPOSIUM ON PARTICLE IMAGE VELOCIMETRY - PIV11, 21.-23. Juli 2011, Kobe, Japan. (im Druck)

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Offizielle URL: http://piv11.org/

Kurzfassung

This contribution introduces 3-D shadowgraphy which is capable of resolving the placement of the liquid phase within a certain spray volume both spatially and temporally. The method is based on a multiple view camera setup and inline illumination provided by current pulsed LEDs. The observed volume is calibrated with a traversed micro target. A comparison is made between several photogrammetric and polynomial least square camera calibration techniques regarding their accuracy in deep volume calibration at magnifications close to 1 : 1. A new calibration method is suggested which derives volume calibration from multiple planar homographies at equally spaced z-planes. After an sequential combination of back-projected images at each voxel plane the 3-D droplet positions can be readily obtained. The quality of spray reconstruction was investigated using experimental data from multiple view shadowgraphs of hollow cone and flat fan water sprays. The investigations were further substantiated with simulations using synthetic data.

Dokumentart:Konferenzbeitrag (Paper)
Titel:On the implementation of tomographic shadowgraphy for spray diagnostics
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Klinner, Joachimjoachim.klinner@dlr.de
Willert, Christianchris.willert@dlr.de
Datum:21 Juli 2011
Referierte Publikation:Ja
In ISI Web of Science:Nein
Status:im Druck
Stichwörter:tomographic reconstruction, pulsed LED, shadowgraphy, multiple views, spray diagnostics, airblast atomization, 3-D particle tracking velocimetry, PTV
Veranstaltungstitel:9TH INTERNATIONAL SYMPOSIUM ON PARTICLE IMAGE VELOCIMETRY - PIV11
Veranstaltungsort:Kobe, Japan
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:21.-23. Juli 2011
Veranstalter :University of Tokyo, University of Kobe
HGF - Forschungsbereich:Energie
HGF - Programm:Rationelle Energieumwandlung (alt)
HGF - Programmthema:E VG - Verbrennungs- und Gasturbinentechnik (alt)
DLR - Schwerpunkt:Energie
DLR - Forschungsgebiet:E VG - Verbrennungs- und Gasturbinentechnik
DLR - Teilgebiet (Projekt, Vorhaben):E - Gasturbine (alt)
Standort: Köln-Porz
Institute & Einrichtungen:Institut für Antriebstechnik > Triebwerksmesstechnik
Hinterlegt von: Joachim Klinner
Hinterlegt am:19 Jan 2012 11:06
Letzte Änderung:12 Dez 2013 21:32

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