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Atomization and Sprays

Published 12 issues per year

ISSN Print: 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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EFFECT OF SPLIT INJECTION ON THE MACROSCOPIC DEVELOPMENT AND ATOMIZATION CHARACTERISTICS OF A DIESEL SPRAY INJECTED THROUGH A COMMON-RAIL SYSTEM

Volume 16, Issue 5, 2006, pp. 543-562
DOI: 10.1615/AtomizSpr.v16.i5.50
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ABSTRACT

This article describes the effects of split injection on the macroscopic behavior and atomization characteristics of a high-speed diesel spray injected through a common-rail system. In order to reveal the effects of the first injection on the second injection under various injection durations, experiments on the injection rate, spray behavior, and drop Sauter mean diameter (SMD) were conducted by using an injection rate meter, a spray visualization system, and a phase Doppler particle analyzer system. The test injector had a single hole with 0.3 mm hole diameter and 0.8 mm nozzle length. In split injections, the sum of the first and second energizing durations was set constant as 1.2 ms, and various split injections were studied. The effect of ambient pressure on the spray development was also investigated by using a high-pressure spray chamber. For the numerical investigations, the KIVA-3 code including a modified nozzle flow model, and a breakup model was applied to the simulation of spray atomization using the same calculation conditions as the experiments. The injection velocity was calculated based on the flow model that considers cavitation in the nozzle and the realistic nozzle geometry. The breakup model, which has a dominant effect in calculating the mean droplet size of the spray, was also modified to include the Kelvin-Helmholtz instability/droplet deformation and breakup (KH-DDB) model. In the KH-DDB model, both wave instability and droplet deformation are considered as the breakup factors upstream of the jet breakup length. On the other hand, beyond the breakup length, only droplet deformation is regarded because the relative velocity between the droplet and the ambient gas is lower in comparison to the velocity above the breakup length. The results show that the effect of interference between injections on the injection pressure is little in comparison to the effect of gas flow. The entrainment of ambient gas by the first injection causes a longer spray tip penetration and larger drop SMD for the second injection in comparison to the case of a single injection.

CITED BY
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  20. Zhou Xinyi, Li Tie, Lai Zheyuan, Huang Shuai, Similarity of split-injected fuel sprays for different size diesel engines, International Journal of Engine Research, 22, 3, 2021. Crossref

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  22. Wu Gang, Zhou Xinyi, Li Tie, Temporal Evolution of Split-Injected Fuel Spray at Elevated Chamber Pressures, Energies, 12, 22, 2019. Crossref

  23. Ramezani S., Amani E., Saffar-Avval M., A combined rate-shaping-splitting injection strategy for regulating stratification characteristics of fuel sprays, Applied Thermal Engineering, 187, 2021. Crossref

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