Abonnement à la biblothèque: Guest
Portail numérique Bibliothèque numérique eBooks Revues Références et comptes rendus Collections
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

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.v6.i4.20
pages 409-433

MEAN BEHAVIOR OF A COAXIAL AIR-BLAST ATOMIZED SPRAY IN A CO-FLOWING AIR STREAM

Jean-Jacques Karl
Université Louis Pasteur, Institut de Mécanique des Fluides, URA CNRS 854, Strasbourg, France
Daniel Huilier
Université Louis Pasteur, Institut de Mécanique des Fluides, URA CNRS 854, Strasbourg, France
Henri Burnage
Université Louis Pasteur, Institut de Mécanique des Fluides, URA CNRS 854, Strasbourg, France

RÉSUMÉ

The aim of this article is to characterize the mean behavior of a polydisperse aerosol discharging streamwise into a homogeneous and nearly isotropic grid turbulence. Air-blast coaxial atomization was used to obtain a polydisperse aerosol composed of water droplets with diameters ranging from 5 to 200 μm, with a mean arithmetic size of about 40 μm. Properties of the dispersed phase, such as velocity, size distribution, size-velocity correlation, and number density, were measured by phase Doppler anemometry at several locations behind the grid in the developed jet region, beginning at 100 nozzle diameters downstream of the jet origin, where dilute spray conditions were encountered. The instrument was also used to evaluate the concentration profiles and to compare the mass flux evaluated at six explored stations to the initial flow rate at the nozzle. Further mean velocity profiles of the carrier airflow were obtained by pressure measurements. The mean behavior of the droplets is quantified in terms of mean Stokes numbers, and a turbulent Schmidt number is calculated for the mass and momentum transfer of the two-phase jet entrained by the turbulent co-flow. In the present case, the "dispersion" process appears to be controlled by the dominating inertial effects, and the larger droplets tend to accumulate on the outer edges of the jet.


Articles with similar content:

LARGE EDDY SIMULATION OF HIGH GAS DENSITY EFFECTS IN FUEL SPRAYS
Atomization and Sprays, Vol.23, 2013, issue 4
Martti Larmi, M. Nuutinen, Ossi Kaario, K. Keskinen, Tuomo Hulkkonen, Ville Vuorinen, Franz X. Tanner
DISPERSION OF A POLYDISPERSE PARTICLE POPULATION FALLING THROUGH A SHEAR LAYER: RAW DATA
Atomization and Sprays, Vol.19, 2009, issue 7
John S. Shrimpton, Simon J. Lewis
LDA/PDA CHARACTERIZATION OF CONICAL SPRAY FOR DIESEL ENGINE
ICLASS 94
Proceedings of the Sixth International Conference on Liquid Atomization and Spray Systems, Vol.0, 1994, issue
T. Obokata, W. Q. Long
PENETRATION OF LIQUID JETS IN A CROSS-FLOW
Atomization and Sprays, Vol.16, 2006, issue 8
Jong Guen Lee, Jacob N. Stenzler, Domenic A. Santavicca, Wonnam Lee
FURTHER DEVELOPMENTS OF A NOVEL SELF-DRIVEN SPRAY NOZZLE
Atomization and Sprays, Vol.16, 2006, issue 7
Weiping Liu, George H. Smith, Edward H. Owens, Mark T. Leonard