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Atomization and Sprays
Editor-in-Chief Europe: Günter Brenn (open in a new tab)
Editor-in-Chief Americas: Marcus Herrmann (open in a new tab)
Редактор-основатель: Norman Chigier (open in a new tab)

Выходит 12 номеров в год

ISSN Печать: 1044-5110

ISSN Онлайн: 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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EFFECT OF AMBIENT TEMPERATURE AND DENSITY ON SHOCK WAVE GENERATION IN A DIESEL ENGINE

Том 20, Выпуск 2, 2010, pp. 163-175
DOI: 10.1615/AtomizSpr.v20.i2.50
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Краткое описание

Shock-wave generation by high-pressure diesel sprays has been investigated over a range of ambient temperature and density in a high-temperature, high-pressure optical vessel. In the past, shock wave generation was considered unlikely for diesel sprays because of the high-temperature environment and low fuel injection pressure. However, recent trends toward very high injection pressures, and earlier (lower temperature) injection in modern diesel engines, can potentially produce shock waves. Through high-speed schlieren imaging, injection-resolved shock waves have been captured at injection pressures of 150 MPa. Marked changes in shock wave generation are shown to occur with variation in ambient conditions that are experienced in an engine, including the following: (1) Shock waves diminish in strength with increasing temperature and eventually disappear due to the increasing speed of sound. (2) At low ambient temperature, high-density ambient gas quickly decelerates the tip of the spray, causing shock waves to detach from the spray. (3) At high ambient temperature, the high density decelerates the spray tip during injection-rate ramp-up before the spray reaches the speed of sound, such that no shock waves are produced.

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