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On the implementation of tomographic shadowgraphy for spray diagnostics

Klinner, Joachim and 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. (In Press)

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Official URL: http://piv11.org/

Abstract

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.

Document Type:Conference or Workshop Item (Paper)
Title:On the implementation of tomographic shadowgraphy for spray diagnostics
Authors:
AuthorsInstitution or Email of Authors
Klinner, Joachimjoachim.klinner@dlr.de
Willert, Christianchris.willert@dlr.de
Date:21 July 2011
Refereed publication:Yes
In ISI Web of Science:No
Status:In Press
Keywords:tomographic reconstruction, pulsed LED, shadowgraphy, multiple views, spray diagnostics, airblast atomization, 3-D particle tracking velocimetry, PTV
Event Title:9TH INTERNATIONAL SYMPOSIUM ON PARTICLE IMAGE VELOCIMETRY - PIV11
Event Location:Kobe, Japan
Event Type:international Conference
Event Dates:21.-23. Juli 2011
Organizer:University of Tokyo, University of Kobe
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion (old)
HGF - Program Themes:E VG - Combustion and Gas Turbine Technologies (old)
DLR - Research area:Energy
DLR - Program:E VG - Combustion and Gas Turbine Technologies
DLR - Research theme (Project):E - Gasturbine (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Propulsion Technology > Engine Measurement Systems
Deposited By: Joachim Klinner
Deposited On:19 Jan 2012 11:06
Last Modified:12 Dec 2013 21:32

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