期刊
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
卷 106, 期 -, 页码 164-178出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijmultiphaseflow.2018.05.028
关键词
Coaxial jet; Two-phase flow; Flapping dynamics; Parametric study
类别
资金
- Carnot Institute Energies du Futur
- LabEx Tec 21 (Investissements d'Avenir) [ANR-11-LABX-0030]
- PRACE [2012061113]
- Institut Universitaire de France
A numerical study of a coaxial liquid jet sheared by an annular high-speed stream is performed at moderate density and velocity ratio between phases. The destabilization mechanism of the jet is studied : due to the shear induced by the high-speed stream, annular interfacial waves are generated near the jet injection, which subsequently connect and yield a sinuous organization for the whole jet, leading to a global flapping phenomenon. The influence of the high-speed stream boundary layer thickness on this flapping is investigated, as well as the influence of the velocity and the momentum flux ratio between phases. It appears that it is not sufficient to consider only the momentum flux ratio between phases to characterize the flapping dynamics or the steps of the atomization process. On the other hand, the Reynolds and Weber numbers based on the high-speed stream properties display a strong influence on these phenomena. (C) 2018 Elsevier Ltd. All rights reserved.
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