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雾化与喷雾
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ISSN 打印: 1044-5110
ISSN 在线: 1936-2684

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雾化与喷雾

DOI: 10.1615/AtomizSpr.v12.i4.80
pages 501-511

BREAKUP TRANSITIONS WITHIN DENSE SPRAYS

Corinne S. Lengsfeld
Department of Mechanical and Materials Engineering, University of Denver, Denver, Colorado 80208, USA
Jean-Pierre Delplanque
UC Davis
Derek Dunn-Rankin
Department of Mechanical and Aerospace Engineering, University of California, Irvine, CA 92697, USA

ABSTRACT

This study evaluates the influence of neighbor—induced changes to the local environment of a droplet in a dense spray on the droplet breakup regime. To this end, previously published breakup data exhibiting a mismatch between the expected isolated droplet breakup transitions and the observed breakup transitions within dense spray environments are re-examined. We find that secondary breakup of droplets within a dense spray is adequately described by the criteria developed for isolated droplets if neighbor—induced changes to the local environment (increase in local vapor concentration, drag reduction caused by leading droplets, and surface tension variation with liquid—gas density ratio) are correctly taken into account when evaluating the criteria for breakup regime transitions.


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