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International Journal of Fluid Mechanics Research

Publicado 6 números por año

ISSN Imprimir: 2152-5102

ISSN En Línea: 2152-5110

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: 1.1 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: 1.3 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: 0.0002 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: 0.33 SJR: 0.256 SNIP: 0.49 CiteScore™:: 2.4 H-Index: 23

Indexed in

Initial Atomization of an Intermittent Spray from a Diesel Nozzle

Volumen 24, Edición 4-6, 1997, pp. 488-497
DOI: 10.1615/InterJFluidMechRes.v24.i4-6.50
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SINOPSIS

The purpose of this study is to clarify the atomization mechanisms of an intermittent fuel spray in its very early stage of injection. A single hole diesel nozzle was used in rather wide range of valve opening pressure from 5 to 70 MPa. The measurement of injection pressure inside the nozzle-sac, that is just at the upstream of the orifice, was attempted by using a micro-strain gauge. Two observation apparatuses were used, an image-converting high-speed camera with the framing rate of 105 f.p.s. and an image-intensified CCD camera with high-speed gating. At the very beginning of injection, an emergence of a liquid column was observed, which had almost the same diameter as the orifice. Then the liquid column spread radially, forming a spray angle in the vicinity of the nozzle exit. The timing of the spray angle formation was shown to become earlier with increasing the in valve opening pressure. Furthermore the pressure inside the nozzle-sac at this moment did not vary. This pressure approximately corresponds to that of the transition from a wavy jet to a developed spray in the atomization regime for a steady jet. Thus, it is suggested that the atomization mechanism of a steady jet could be applicable to the unsteady spray formation process. Under several injection conditions, it was observed the formation of a thin thread at the tip of the original spray. It appeared at the very beginning of injection, and developed to the length of 2 or 3 mm. The tip gradually broke up, decreased the velocity, and was finally caught up by the original spray.

CITADO POR
  1. Badock C, Wirth R, Fath A, Leipertz A, Investigation of cavitation in real size diesel injection nozzles, International Journal of Heat and Fluid Flow, 20, 5, 1999. Crossref

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