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Experiments in Fluids

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01.08.2014 | Research Article

Outer ligament-mediated spray formation of annular liquid sheet by an inner round air stream

verfasst von: Hui Zhao, Hai-Feng Liu, Xiu-Shan Tian, Jian-Liang Xu, Wei-Feng Li, Kuang-Fei Lin

Erschienen in: Experiments in Fluids | Ausgabe 8/2014

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Abstract

The interfacial jetting phenomena of coaxial air-assisted water jets are studied using high-speed digital camera. Here, an inner round air jet is injected into annular water sheet spray. The experimental photographs show that the outside interface of liquid sheet shoots out large numbers of violent ligaments at high air velocity. The ligament velocity, ligament angle, ligament diameter, fragment size, and distribution are measured and analyzed. There are two kinds of ligament evolution that are breakup and contraction. An empirical model is also proposed for the ligament evolution process. At last, we obtain the criterion of critical Weber number on the ligament breakup based on the experimental results. This suggestion agrees well with the experimental data.

Vorheriger Artikel Schlieren-based techniques for investigating instability development and transition in a hypersonic boundary layer

Nächster Artikel Near-field development of a row of round jets at low Reynolds numbers

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Titel: Outer ligament-mediated spray formation of annular liquid sheet by an inner round air stream
verfasst von: Hui Zhao
Hai-Feng Liu
Xiu-Shan Tian
Jian-Liang Xu
Wei-Feng Li
Kuang-Fei Lin
Publikationsdatum: 01.08.2014
Verlag: Springer Berlin Heidelberg
Erschienen in: Experiments in Fluids / Ausgabe 8/2014
Print ISSN: 0723-4864
Elektronische ISSN: 1432-1114
DOI: https://doi.org/10.1007/s00348-014-1793-6

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