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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

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DECOUPLING THE EFFECT OF SURFACE TENSION AND VISCOSITY ON SPRAY CHARACTERISTICS UNDER DIFFERENT AMBIENT PRESSURES: NEAR-NOZZLE BEHAVIOR AND MACROSCOPIC CHARACTERISTICS

巻 29, 発行 7, 2019, pp. 629-654
DOI: 10.1615/AtomizSpr.2019030936
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要約

This work experimentally investigates the effect of the surface tension and viscosity on the spray characteristics at low (1 atm) and high (10 and 20 atm) ambient pressures. The surface tension and viscosity of the liquids vary from 26.41 to 60.93 mN/m and 1.01 to 7.45 mPa · s, respectively. First, by using the long focus distance microscope and the pulse laser illumination at the near-nozzle region, high spatial resolution initial spray morphology was captured to explore the effect of surface tension and viscosity on the primary breakup behavior. Results show that less ligaments and droplets were detected with the increase of surface tension. Increasing viscosity for fixed surface tension delays the breakup and consequently postpones the formation of spray ligaments and droplets. The near-nozzle spray morphology is more sensitive to the variation of viscosity, compared to the surface tension. Second, high-speed photography is utilized to record the macroscopic spray behaviors. The results show that, at high ambient pressures, with the increase of surface tension or the viscosity, the spray tip penetration becomes longer and the spray cone angle becomes smaller. In addition, the spray cone angle is more sensitive to the change of the surface tension than viscosity. However, at low ambient pressure, both the surface tension and viscosity show weak influence. Finally, the classic Hiroyasu model for spray tip penetration was extended to accommodate liquids with varying surface tension and viscosity. The modified correlation matches the experimental data well, and the spray tip penetration is more sensitive to the variation of the surface tension, compared to the viscosity.

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