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Atomization and Sprays

年間 12 号発行

ISSN 印刷: 1044-5110

ISSN オンライン: 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

STRING CAVITATION IN A FUEL INJECTOR

巻 27, 発行 3, 2017, pp. 189-205
DOI: 10.1615/AtomizSpr.2016016276
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要約

In a nozzle hole of a diesel fuel injector, string cavitation may appear along the nozzle-hole axis which affects the fuel spray characteristics. Previous studies concluded that string cavitation is the result of the complex swirling flow in the upstream region. However, the mechanism of the swirling flow formation, the condition of string cavitation appearance, and its effects on the injected liquid jet are not well understood. In this study, visualization of cavitation in a cylindrical nozzle hole with an asymmetric inflow from various simple rectangular upstream channels was conducted. The effects of needle lift and the number of nozzle holes were examined by changing the height and the width of the upstream channel, respectively. High-speed images of string cavitation formation were captured. A simple numerical simulation was carried out to qualitatively examine the velocity and pressure distributions. As a result, we clarify the condition of string cavitation formation and propose the string cavitation regime maps which take dimensionless needle lift and liquid velocity as major parameters. We find that string cavitation and a resulting swirling hollow-cone liquid skirt are formed at low needle lift and high liquid velocity, while at high needle lift no string cavitation is formed. Under the narrower upstream channel width condition, which represents a fuel injector with many nozzle holes, string cavitation occurs only at much lower needle lift and higher liquid velocity. The numerical results show a good agreement with the experiment results; i.e., a slanted swirling inflow with low pressure along its axis is formed in the nozzle hole only under the low needle lift condition.

によって引用された
  1. Li Xuesong, Yang Shangze, Li Tianyun, Hung David L.S., Xu Min, Investigations on near-field atomization of flash boiling sprays for gasoline direct injection related applications, Fuel, 257, 2019. Crossref

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