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Atomization and Sprays
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ISSN Imprimir: 1044-5110
ISSN En Línea: 1936-2684

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Atomization and Sprays

DOI: 10.1615/AtomizSpr.v17.i3.20
pages 233-265

GASOLINE SPRAYS INJECTED AT DIFFERENT BACK PRESSURES: CALCULATIONS USING TWO ATOMIZATION MODELS

N. B. H. Abdelkarim
Department of Aeronautical and Automotive Engineering, Loughborough University, Loughborough, UK
Salah S. Ibrahim
Department of Aeronautical and Automotive Engineering, Loughborough University, Loughborough, Leicester, LE11 3TU, UK
Assaad Masri
The University of Sydney
Graham Wigley
Aeronautical and Automotive Engineering, Stewart Miller Building, Loughborough University, Leicestershire LE11 3TU, United Kingdom

SINOPSIS

A numerical study of pressure-swirl hollow-cone sprays injected at two different ambient pressures is presented to simulate the gasoline direct-injection process. Only nonreacting sprays are considered, with the focus being on the breakup and atomization processes. Two different breakup models have been evaluated, (1) a hybrid version of a sheet length model combined with the Taylor analogy breakup as a secondary breakup model and (2) the surface wave instability breakup model. Two test cases, injection into atmospheric and above-atmospheric ambient pressure were computed for the assessment of the breakup models. Comparison of calculations with experimental data reveals sufficient agreement. However, the models' performance was case dependent, which suggested further investigation of their breakup mechanisms.


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