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Atomization and Sprays

Publicou 12 edições por ano

ISSN Imprimir: 1044-5110

ISSN On-line: 1936-2684

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 1.2 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 1.8 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.3 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00095 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.28 SJR: 0.341 SNIP: 0.536 CiteScore™:: 1.9 H-Index: 57

Indexed in

EXPERIMENTAL STUDY OF COAXIAL ATOMIZERS SCALING. PART I: DENSE CORE ZONE

Volume 17, Edição 5, 2007, pp. 381-407
DOI: 10.1615/AtomizSpr.v17.i5.10
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RESUMO

Coaxial injection is a very common system in industrial burners or rocket engines. Theoretical studies involving different hypotheses have been devoted to this subject. Experimental studies have been performed in several individual configurations. Subsequently, many correlations are proposed in the literature. All these expressions do not take into account the same basic quantities, which may be troublesome for injector designers. In the present work, we have performed experiments in a system where both geometry and liquid characteristics could be varied over a wide range. Changes in atomization regimes, liquid core length, and spray angle are especially examined in the present paper. They were estimated using fast shadowgraphy. We show that the momentum flux ratio plays a key role in all these quantities in the dense core zone. Gas flow Reynolds number is also important for disintegration mode classification. Empirical correlations show that liquid's physical properties (viscosity or surface tension) have little influence on the atomization process in the range studied. The Rayleigh instability growth rate model, based on the existence of a shear layer at the interface, seems to be the most suitable in predicting the dense core zone properties, showing that primary atomization in coaxial injectors is essentially ruled by aerodynamic effects.

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