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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

Indexed in

MODEL OF THE FUEL JET PRIMARY ATOMIZATION AND AERODYNAMICS OF SPRAY FORMATION AT HIGH-PRESSURE INJECTION IN A DIESEL ENGINE

Volumen 28, Ausgabe 3, 2018, pp. 195-216
DOI: 10.1615/AtomizSpr.2018021093
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ABSTRAKT

The model of a jet atomization and spray formation in a diesel engine is presented. The jet is assumed to have a shape of Rankine's ogive body, and the related potential of air flow past the body is applied. The quasi-continuous, high-frequency dispersion from the unstable part of a jet surface caused by hydrodynamic instability of a gradient flow in conjugated (gas–liquid) boundary layers is adopted as an atomization mechanism. The Karman–Pohlhausen technique is used to calculate the conjugated boundary layer thickness distributions at both, air and fuel, sides of the jet surface, as well as the interface velocity. This problem is simplified, making use of the linear approximation of the conjugated velocity profile, which theoretically allow the jet drag coefficient. The main assumptions and numerical scheme of the spray formation are the extensions of the previous model of a drop atomization. The modeling at lower level solves the mechanics of atomization and gives initials to the upper-level modeling of spatial aerodynamics of the evaporating spray generated by the atomizing jet. The evaporating spray ballistics are rendered as multi-velocity equations in dynamic 4-D space, and the CFD method is used to investigate the problem at an early stage. A comprehensive mapping of the droplet-phase and vapor fields in the diesel jet spray is obtained. The transient spatial distributions of the droplet-phase mass and number densities, as well as the vapor density, droplet mean diameters, and polydispersity within the spray are described. Analysis of the calculated data shows the existence of aerodynamic mechanism of fuel-air mixing, which scatters the fuel droplets in the radial traverses of a spray.

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