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Atomization and Sprays
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ISSN Druckformat: 1044-5110
ISSN Online: 1936-2684

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Atomization and Sprays

DOI: 10.1615/AtomizSpr.v2.i3.20
pages 225-237

BOUNDARY-LAYER CHARACTERISTICS OF A SWIRL ATOMIZER

Christophe Dumouchel
Université et INSA de Rouen France
M. I. G. Bloor
Department of Applied Mathematical Studies, University of Leeds, West Yorbhire, Leeds, LS2 9JT, U.K.
N. Dombrowski
Department of Chemical Engineering, University of Leeds, Leeds, UK
Derek B. Ingham
Centre for CFD, Department of Applied Mathematical Studies, The University of Leeds, Leeds, LS2 9JT, UK; Energy-2050, Faculty of Engineering, University of Sheffield, Sheffield, S10 2TN, UK
M. Ledoux
CORIA-UMR CNRS 6614, Universite de Rouen, Site du Madrillet Avenue de l’Universite, BP12 76801 Saint Etienne du Rouvray cedex, France

ABSTRAKT

The Bloor and Ingham analysis for the boundary-layer flow above aflat disk has been used for the case of a swirling flow in a conical nozzle, and the proportion of the fluid that enters the orifice through the boundary layer has been estimated. Comparisons of these results with measured flow rates indicate that the flow through the boundary layer represents almost all the outflow from a swirl atomizer over a wide range of injection pressures when the radius of the orifice and the radius of the inlet groove are relatively small compared to the radius of the swirl chamber, but that it may be neglected for small injection pressures and large radii of the orifice and the inlet groove.


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