Abonnement à la biblothèque: Guest
Portail numérique Bibliothèque numérique eBooks Revues Références et comptes rendus Collections
Atomization and Sprays
Facteur d'impact: 1.262 Facteur d'impact sur 5 ans: 1.518 SJR: 0.814 SNIP: 1.18 CiteScore™: 1.6

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

Volumes:
Volume 29, 2019 Volume 28, 2018 Volume 27, 2017 Volume 26, 2016 Volume 25, 2015 Volume 24, 2014 Volume 23, 2013 Volume 22, 2012 Volume 21, 2011 Volume 20, 2010 Volume 19, 2009 Volume 18, 2008 Volume 17, 2007 Volume 16, 2006 Volume 15, 2005 Volume 14, 2004 Volume 13, 2003 Volume 12, 2002 Volume 11, 2001 Volume 10, 2000 Volume 9, 1999 Volume 8, 1998 Volume 7, 1997 Volume 6, 1996 Volume 5, 1995 Volume 4, 1994 Volume 3, 1993 Volume 2, 1992 Volume 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

RÉSUMÉ

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.


Articles with similar content:

MEAN BEHAVIOR OF A COAXIAL AIR-BLAST ATOMIZED SPRAY IN A CO-FLOWING AIR STREAM
Atomization and Sprays, Vol.6, 1996, issue 4
Jean-Jacques Karl, Daniel Huilier, Henri Burnage
Droplet Dispersion and Vapor Mixing by Fine Scale Turbulence
ICHMT DIGITAL LIBRARY ONLINE, Vol.10, 2006, issue
Mamoru Tanahashi, Toshio Miyauchi, Makoto Sato
SPRAY CHARACTERISTICS OF CHARGE INJECTION ELECTROSTATIC ATOMIZERS WITH SMALL-ORIFICE DIAMETERS
Atomization and Sprays, Vol.16, 2006, issue 4
John S. Shrimpton, A. R. H. Rigit
LINKING NOZZLE FLOW WITH SPRAY CHARACTERISTICS IN A DIESEL FUEL INJECTION SYSTEM
Atomization and Sprays, Vol.8, 1998, issue 3
Manolis Gavaises, C. Arcoumanis
MEASUREMENTS OF ATOMIZATION QUALITY AND AIR ENTRAINMENT FOR A TRANSIENT DENSE DIESEL FUEL SPRAY
ICLASS 94
Proceedings of the Sixth International Conference on Liquid Atomization and Spray Systems, Vol.0, 1994, issue
M. M. Elkotb, H. A. EI-Salmawy