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雾化与喷雾

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ISSN 打印: 1044-5110

ISSN 在线: 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

IMPROVED ATOMIZATION USING VARIABLE ASPECT RATIO AIR SWIRLERS

卷 29, 册 7, 2019, pp. 655-675
DOI: 10.1615/AtomizSpr.2020031390
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摘要

In this paper, novel designs of air swirlers having variable aspect ratio (VAR) with variation in hub/tip diameter from swirler inlet to exit are proposed and the performance of VAR swirlers with respect to spray atomization and dispersion is experimentally investigated. A laser Doppler velocimeter is used to track the air velocity field, and high-speed imaging and phase Doppler interferometer are used to measure the spray characteristics. Airflow rate is varied from 0 to 2400 lpm, and liquid injection pressure is varied between 0.1 bar to 3 bar (gauge). The reduction in aspect ratio and flow area in the flow direction leads to acceleration of airflow toward the exit. In addition, higher magnitudes of tangential and radial air velocities are induced near the orifice, which improves spray atomization. The size of the air recirculation zone is also larger for VAR swirlers. At very low liquid injection pressures, with a conventional air swirler, the spray does not open up; also, the radial dispersion of the spray is poor and the variation of average droplet size is very significant. However, a fully developed open spray with finer atomization, better dispersion, and milder spatial variation of droplet size is observed when VAR air swirlers are employed.

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