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Atomization and Sprays

Erscheint 12 Ausgaben pro Jahr

ISSN Druckformat: 1044-5110

ISSN Online: 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

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MACROSCOPIC CHARACTERIZATION OF FLASH-BOILING MULTI-HOLE SPRAYS USING PLANAR LASER INDUCED EXCIPLEX FLUORESCENCE TECHNIQUE. PART I. ON-AXIS SPRAY STRUCTURE

Volumen 22, Ausgabe 10, 2012, pp. 861-878
DOI: 10.1615/AtomizSpr.2013006760
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ABSTRAKT

Fuel temperature and the ambient pressure can dramatically influence spray characteristics such as spray structure, spray penetration, and quantity of vaporized fuel. Higher fuel temperatures that occur in today's direct-injection (DI) engines can make the injected fuel reach superheated conditions, dramatically changing the spray due to flash-boiling. In this paper, the spray structure and vaporization behaviors are examined for a multi-hole gasoline DI injector over a range of superheated conditions. Planer laser induced exciplex fluorescence (PLIEF) is used to characterize the spray, where fluorobenzene (FB) and diethyl-methyl-amine (DEMA) are added into n-hexane as the base fuel simulating gasoline to track the liquid and vapor distribution. The temperature dependence of cross talk between the vapor and liquid signals is examined using a quartz calibration cell, after which a careful correction is applied to the spray image. The results show that multiple plumes from this multi-hole injector collapse with increasing superheat degree until the spray transforms into a single solid plume. The liquid component of the spray collapses less as compared to the vapor component, which becomes a complete gaseous jet concentrated at the centerline axis of the spray. The vapor quantity increases with the superheat degree of fuel linearly in two slopes before and after the collapsing. When the increased superheat degree triggers the collapsing, the vaporization rate escalates dramatically, indicating a rapid phase change due to flash-boiling.

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