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雾化与喷雾
影响因子: 1.262 5年影响因子: 1.518 SJR: 0.814 SNIP: 1.18 CiteScore™: 1.6

ISSN 打印: 1044-5110
ISSN 在线: 1936-2684

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雾化与喷雾

DOI: 10.1615/AtomizSpr.v17.i4.20
pages 315-345

A NEW MODEL FOR TURBULENT FLOWS WITH LARGE DENSITY FLUCTUATIONS: APPLICATION TO LIQUID ATOMIZATION

Francois-Xavier Demoulin
CORIA UMR 6614, University of Rouen, Technopole du Madrillet, BP 12, 76801 Saint-Etienne-du-Rouvray Cedex, France
Pierre-Arnaud Beau
Coria UMR6614 CNRS, Université de Rouen, BP 12, Site universitaire du Madrillet, 76801 Saint Etienne du Rouvray Cedex, France
Gregory Blokkeel
PSA Peugeot Citroën, Route de Gisy, 78943 Vélizy-Villacoublay Cedex, France
Arnaud Mura
Institut Pprime - UPR 3346 - CNRS - ENSMA - Universite de Poitiers BP 40109, 86961 Futuroscope, France
R. Borghi
EGIM, IMT - Technopôle de Château-Gombert, 38, rue Joliot Curie 13451 Marseille Cedex 20, France

ABSTRACT

Based on the original modeling proposal of Borghi and coworkers (A. Vallet, A. A. Burluka, and R. Borghi, Atomization and Sprays, vol. 11, pp. 619-642, 2001), a new model for atomization, focused on the description of the primary breakup, has been developed. For high injection velocities, the dense zone located just at the injector exit is generally not well described because of the strong interactions between complex phenomena. The classical Lagrangian approach that considers individual liquid droplets or blobs is not a satisfactory representation for such complex liquid flow topologies with liquid core ligaments and eventually droplets. Here, a more global approach is used, with liquid and gas considered as two species of a unique turbulent flow. Therefore, the initial liquid dispersion is given by a turbulent liquid mass flux. The purpose of this work is first to evaluate the usual models for this turbulent liquid flux and then to modify them for the specific turbulent flow with a very high density ratio considered here.


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