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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

INTERNAL FLOW PATTERN AND MACROSCOPIC CHARACTERISTICS OF A FLASH-BOILING SPRAY ACTUATED THROUGH A TWIN-ORIFICE ATOMIZER WITH LOW INJECTION PRESSURE

Volume 26, Edição 4, 2016, pp. 377-410
DOI: 10.1615/AtomizSpr.2015013372
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RESUMO

This work is to investigate the internal flow pattern and macroscopic spray characteristics of1,1,1,2- tetrafluoroethane (R134a) actuated through a twin-orifice atomizer. The geometry of the injector consists of one inlet orifice and one discharge nozzle separated by a cylindrical expansion chamber. Two inlet orifices with the diameters of 0.6 and 3.0 mm were conducted from the supply line of R134a to find the influence of the inlet orifice geometry on the flow and spray behavior. Four polymethacrylate atomizers were manufactured to study the effects of the various aspect ratios of expansion chambers and different diameters of discharge nozzles on the internal flow pattern and atomization characteristics. Here, the diameters of the discharge nozzles were 0.6 and 1.0 mm with the same aspect ratio of 10.0, and the aspect ratios of the expansion chambers were 0.5 and 1.0 with the same diameter of 13.0 mm. A low injection pressure of 0.6 MPa was used to produce a "stable" flash-boiling spray vertically in this work, and the ambient condition was atmospheric. The internal flow and spray images were recorded at various times after the start of actuation using a visualization system consisting of a high-speed digital camera and a metal halide lamp as the illumination source. Bubble growth, boiling phenomena in the expansion chamber, and external liquid atomization were observed simultaneously during the actuation. The transient continuous spray angles were measured at each case. The relationship between the internal boiling flow in the expansion chamber and external flash-boiling spray was analyzed. The most interesting observation is that the periodic bifurcations of the spray were formed by the twin-orifice injector when the inlet orifice diameter was 3.0 mm and the discharge nozzle diameter was 0.6 mm. This work provides a guide and reference for the volatile or liquefied material actuated through a twin-orifice atomizer with low injection pressure.

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