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High speed shadowgraphy of a combusting air blast atomizer spray at elevated pressure

Willert, Christian and Moessner, Steffen and Freitag, Stefan and Hassa, Christoph (2010) High speed shadowgraphy of a combusting air blast atomizer spray at elevated pressure. 23rd Annual Conference on Liquid Atomization and Sprays, ILASS Europe 2010 (, 06.-08. Sep. 2010, Brno, Czech Republic.

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Abstract

This contribution demonstrates the use of a compact high repetition rate pulsed high power LED light source in combination with a high speed camera to obtain high speed shadowgraphs of an airblasted spray in a fired research combustor at medium pressures. The temporally resolved structures are subjected to conventional spectral analysis and exhibit very dominant fundamental frequencies throughout the visualized spray structures. The image data is further compared to time series of drop-sizing measurements made by a phase Doppler instrument. The periodicity is attributed to a spiraling spray release from the nozzle lip that is believed to be induced by a precessing vortex or vortices orbiting around the burner axis.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:High speed shadowgraphy of a combusting air blast atomizer spray at elevated pressure
Authors:
AuthorsInstitution or Email of Authors
Willert, Christianchris.willert@dlr.de
Moessner, SteffenUNSPECIFIED
Freitag, Stefanstefan.freitag@dlr.de
Hassa, Christophchristoph.hassa@dlr.de
Date:6 September 2010
Refereed publication:Yes
In ISI Web of Science:No
Status:Published
Keywords:light emitting diode, pulsed illumination, fuel spray, shadowgraphy, combustion, high speed imaging, flow diagnostics, swirl burner
Event Title:23rd Annual Conference on Liquid Atomization and Sprays, ILASS Europe 2010 (
Event Location:Brno, Czech Republic
Event Type:international Conference
Event Dates:06.-08. Sep. 2010
Organizer:Brno University of Technology
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Propulsion Systems
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Virtual Engine and Validation Methods
Location: Köln-Porz
Institutes and Institutions:Institute of Propulsion Technology
Institute of Propulsion Technology > Engine Measurement Systems
Institute of Propulsion Technology > Combustor
Deposited By: Dr.phil. Christian Willert
Deposited On:13 Sep 2010 10:38
Last Modified:12 Dec 2013 21:01

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