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Atomization and Sprays
Импакт фактор: 1.262 5-летний Импакт фактор: 1.518 SJR: 0.814 SNIP: 1.18 CiteScore™: 1.6

ISSN Печать: 1044-5110
ISSN Онлайн: 1936-2684

Выпуски:
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Atomization and Sprays

DOI: 10.1615/AtomizSpr.2015011054
pages 753-775

IMAGE PROCESSING TECHNIQUES FOR VELOCITY, INTERFACE COMPLEXITY, AND DROPLET PRODUCTION MEASUREMENT IN THE NEAR-NOZZLE REGION OF A DIESEL SPRAY

Kamel Lounnaci
UMR 6614-CORIA, Normandie Université, CNRS, Université et INSA de Rouen, BP12, Avenue de l'Université 76801 Saint-Etienne du Rouvray Cedex, France
S. Idlahcen
UMR 6614-CORIA, CNRS, Universite et INSA de Rouen, BP12, Avenue de l'Universite, 76801 Saint-Etienne du Rouvray Cedex, France
David Sedarsky
UMR 6614-CORIA, CNRS, Universite et INSA de Rouen, BP12, Avenue de l'Universite, 76801 Saint-Etienne du Rouvray Cedex, France; Applied Mechanics, Chalmers University of Technology, S-412 96, Gothenburg, Sweden
C. Roze
UMR 6614-CORIA, CNRS, Universite et INSA de Rouen, BP12, Avenue de l'Universite, 76801 Saint-Etienne du Rouvray Cedex, France
Jean-Bernard Blaisot
University of Rouen
Francois-Xavier Demoulin
CORIA UMR 6614, University of Rouen, Technopole du Madrillet, BP 12, 76801 Saint-Etienne-du-Rouvray Cedex, France

Краткое описание

An ultrafast shadow imaging arrangement using a double-pulsed femtosecond laser system in concert with a frame transfer CCD was used to record time-correlated image-pairs in the near-nozzle region of a dissymmetric diesel jet issuing from a single-hole injector. A region-matching procedure was applied to produce velocity maps of the spray. The time-correlated image data were binarized and segmented to produce comparative data sets which isolate the jet core and the surrounding droplet cloud. The velocity mapping process was applied to these segmented data sets, a variable characterizing the degree of atomization of the jet was defined by means of statistical analysis, and the curvature scale space of the jet core edge was used to extract a measure of its complexity.


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