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Atomization and Sprays

Publicado 12 números por año

ISSN Imprimir: 1044-5110

ISSN En Línea: 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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EXPERIMENTAL STUDY ON VELOCITY DISTRIBUTION OF POST-IMPINGEMENT DIESEL SPRAY ON A WALL. PART 2: EFFECT OF AMBIENT GAS DENSITY AND INJECTION PRESSURE ON FLOW PATTERN

Volumen 26, Edición 9, 2016, pp. 921-938
DOI: 10.1615/AtomizSpr.2015013637
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SINOPSIS

Recently, in order to improve the thermal efficiency of diesel engines, there has been a tendency to increase injection pressure of diesel fuel to promote atomization of the fuel. Moreover, the combustion chamber of the engine has been downsized to reduce fuel consumption. These strategies for the improvement of thermal efficiency result in impingement of the diesel spray on a cavity wall of the combustion chamber. Therefore, it is necessary to understand the impingement process of the diesel spray in order to consider reduction strategy of heat loss by heat transfer between the impingement spray and the cavity wall. Moreover, ambient gas density in a combustion chamber of a modern engine tends to increase by a high boost as compared with a conventional engine in order to apply an exhaust gas recirculation (EGR) system. In this study, the effects of ambient gas density and injection pressure on flow characteristics of the impingement diesel spray were investigated. The velocity field of the impingement diesel spray was measured with time-resolved PIV, and the mean velocity field and turbulent kinetic energy inside the impingement spray were evaluated. As a result, there was not much difference in normalized velocity distributions in the wall spray flow region, even though ambient gas density and injection pressure were changed. The normalized velocity distributions of the spray were compared with those of impingement air jets obtained from the existing literature. The velocity distribution of the spray was similar to that of the impingement air jet. It means that the analogy between the spray and the jet might be maintained, even though there was a difference between single-phase flow and two-phase flow. Moreover, turbulent kinetic energy of the impingement spray near the wall decreased with a raise of ambient gas density and with a decrease in injection pressure.

CITADO POR
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