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Atomization and Sprays
インパクトファクター: 1.262 5年インパクトファクター: 1.518 SJR: 0.814 SNIP: 1.18 CiteScore™: 1.6

ISSN 印刷: 1044-5110
ISSN オンライン: 1936-2684

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Atomization and Sprays

DOI: 10.1615/AtomizSpr.v7.i6.70
pages 663-684

MODELING ATOMIZATION PROCESSES OF PRESSURE-SWIRL HOLLOW-CONE FUEL SPRAYS

Zhiyu Han
State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha, China; Huai'an Industrial Technology Research Institute, Huai'an, China
Scott E. Parrish
General Motors Global R&D, 30500 Mound Road, Warren, MI, 48090-9055, USA
Patrick V. Farrell
Engine Research Center, University of Wisconsin—Madison, Madison, Wisconsin, USA
Rolf D. Reitz
Engine Research Center, University of Wisconsin-Madison, Rm 1018A, 1500 Engineering Drive, Madison, Wisconsin 53706, USA

要約

A sheet spray model is proposed to study the atomization and breakup processes of hollow-cone fuel sprays resulting from pressure-swirl injectors which have potential for use in direct-injection gasoline engines. Atomization is described using a method whereby “blobs” that represents the liquid sheet outside the injector nozzle are injected with sizes equal to the sheet thickness. Breakup of the blobs and the subsequent drops is modeled using a modified Taylor analogy breakup (TAB) model in which the originally used χ-squared size distribution for the breakup drops is replaced by a Rosin-Rammler distribution for the hollow-cone sprays considered, since the former distribution was found to result in an overestimated population of large drops. The model is implemented in a multidimensional computer code and used to study pressure-swirl atomized sprays. Detailed comparisons of computed and experimentally determined spray characteristics such as spray structures, spray tip penetrations, drop sizes, and their distribution are made, and good levels of agreement are obtained.


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