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Atomization and Sprays

Publication de 12  numéros par an

ISSN Imprimer: 1044-5110

ISSN En ligne: 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

DISINTEGRATION OF LARGE BALLS OF WATER-BASED LIQUIDS IN FREE FALL THROUGH HIGH-TEMPERATURE GASES

Volume 27, Numéro 10, 2017, pp. 893-911
DOI: 10.1615/AtomizSpr.2017018526
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RÉSUMÉ

This paper presents an experimental study of the transformation (i.e., deformation and disintegration) of liquid balls in free fall through a gaseous environment at temperatures from 300 to 1100 K. The experiments involve the use of the following liquids: water, NaCl solution, and a suspension with carbon particles; the initial volume of liquid balls ranges from 0.05 l to 1 l. We apply high-speed video cameras, Phantom V411 and Phantom Miro M310 (up to 6 × 105 frames per second), and Tema Automotive software, providing the ability to track objects continuously. The study establishes the mechanism of deformation and disintegration of liquid balls. The following factors influence characteristics of these processes: the initial volume of liquid balls, their component composition, the velocity of the side airflow (wind), and the temperature of gases (i.e., air and combustion products). In addition, the Weber numbers are determined for the transitions between the transformation stages of the liquid balls. The determination of Weber numbers is necessary for illustrating the limiting conditions at which the breakup of liquid balls and the transition from one stage of deformation to another occur. The research illustrates the limitations of an increase in transverse and longitudinal sizes of liquid balls during deformation under conditions corresponding to extinguishing fires. The results substantiate the necessity of spraying water for covering a larger fire area. In the case of the local water discharge, batches of liquids transform to clouds consisting of droplets with small transverse sizes even after falling several dozens of meters. Combustion products heated up to high temperatures essentially decelerate a transition from the monolithic ball of water to the droplet cloud and limit its transverse size. This limitation is associated with the intensive evaporation and the formation of buffer vapor zones between combustion products and the droplet cloud.

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