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Atomization and Sprays
Facteur d'impact: 1.189 Facteur d'impact sur 5 ans: 1.596 SJR: 0.814 SNIP: 1.18 CiteScore™: 1.6

ISSN Imprimer: 1044-5110
ISSN En ligne: 1936-2684

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Atomization and Sprays

DOI: 10.1615/AtomizSpr.v11.i4.10
pages 305-316

SPRAY EVOLUTION OF A COFLOWING ROUND LIQUID JET IN HIGH-SPEED AIR FLOW

A. P. Johnston
Mechanical and Aerospace Engineering and Engineering Mechanics Department, University of Missouri—Rolla, Rolla, Missouri, USA
K. M. Isaac
Mechanical and Aerospace Engineering and Engineering Mechanics Department, University of Missouri—Rolla, Rolla, Missouri, USA

RÉSUMÉ

Instantaneous flow visualization was used to study spray evolution in high-speed flow. At very low air velocities, the observed instability of the liquid column agreed qualitatively with numerical simulation of other workers using model eddies. Downstream, a supersonic region with helical instability displaying treelike branches, and a more familiar subsonic region with transverse instability waves, were observed. Apparently, most of the liquid jet was atomized in the upstream, supersonic regions, followed by entrainment of the surrounding air and mixing with it in the subsonic regions.


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