ITEMS

modern scholarly publishers in the finest tradition

Journals

	Search

Atomization and Sprays

Journal of the International Institutes for Liquid Atomization and Spray Systems

ISSN for PRINT: 1045-5110

Institutional price:	$787.00
Issues per year:	8

Best Paper Award Selection - Editorial Board Site

2007, Volume17

100 pages

Issue price - $109.00

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

S. S. Ibrahim
Department of Aeronautical and Automotive Engineering, Loughborough University, Loughborough, Leicester, LE11 3TU, UK

A. R. Masri
B. School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, NSW 2006, Australia

G. Wigley
Department of Aeronautical and Automotive Engineering, Loughborough University, Loughborough, UK

ABSTRACT

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.