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Портал Begell Электронная Бибилиотека e-Книги Журналы Справочники и Сборники статей Коллекции
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:
Том 29, 2019 Том 28, 2018 Том 27, 2017 Том 26, 2016 Том 25, 2015 Том 24, 2014 Том 23, 2013 Том 22, 2012 Том 21, 2011 Том 20, 2010 Том 19, 2009 Том 18, 2008 Том 17, 2007 Том 16, 2006 Том 15, 2005 Том 14, 2004 Том 13, 2003 Том 12, 2002 Том 11, 2001 Том 10, 2000 Том 9, 1999 Том 8, 1998 Том 7, 1997 Том 6, 1996 Том 5, 1995 Том 4, 1994 Том 3, 1993 Том 2, 1992 Том 1, 1991

Atomization and Sprays

DOI: 10.1615/AtomizSpr.v10.i6.50
24 pages

MEAN STRUCTURE AND DROPLET BEHAVIOR IN A COAXIAL AIRBLAST ATOMIZED SPRAY: SELF-SIMILARITY AND VELOCITY DECAY FUNCTIONS

M. de Vega
Universidad Carlos III de Madrid (UC3M), Avda. Universidad 30, 28911 Leganes, Madrid, Spain
A. Lecuona
Area de Ingenieria Termica. E.P.S. Universidad Carlos III de Madrid, Madrid Spain

Краткое описание

The far-field turbulent structure of an airblast coaxial spray without swirl has been studied using a two-velocity-component phase Doppler anemometer. Size, velocity, and droplet number density have been measured at nine different locations from the injection plane. The measurements have been checked against an extinction sensor. Deceleration has been studied and compared with other experiments in coaxial sprays, gaseous, and particle-laden jets. An expression, valid to describe the deceleration in coaxial sprays with a similar breakup mechanism, is proposed. Furthermore, five representative droplet families discriminated by their Stokes number have been selected to study differences in their dynamic evolution in the spray. Self-similar velocity profiles in the mean and turbulent components have been obtained. In the axial component all droplets are seen to behave similarly, while significant differences are observed in the transverse velocity. Mean particle number density profiles are top-hat-shaped, while the highest number density of droplets with Stokes number near unity is placed at off-axis locations. The distribution of the volume flux has also been calculated.