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International Journal of Energetic Materials and Chemical Propulsion

Publicado 6 números por año

ISSN Imprimir: 2150-766X

ISSN En Línea: 2150-7678

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: 0.7 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: 0.7 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: 0.1 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: 0.00016 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: 0.18 SJR: 0.313 SNIP: 0.6 CiteScore™:: 1.6 H-Index: 16

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GAP DISTANCE EFFECT ON BURNING RATE OF TWO OPPOSING JA2 PROPELLANT GRAINS

Volumen 6, Edición 6, 2007, pp. 775-791
DOI: 10.1615/IntJEnergeticMaterialsChemProp.v6.i6.70
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SINOPSIS

The combustion process of gun propellants packed in high loading density conditions can differ significantly from those burning individually in the same pressure and temperature environment. More specifically, burning rates and flame-spreading processes for a propellant charge are not only functions of pressure and initial temperature, but are also a function of the loading density. An experimental study has been conducted to investigate the influence of gap space between propellants on propellant regression rates. In the experimental setup, two opposing strands of JA2 gun propellant were burned in a double-ended windowed strand burner (DEWSB) with a novel control system. A series of tests was conducted for a pressure range from 0.69 to 3.45 MPa, and a gap distance ranged from 0.5 to 12 mm. Comparing regression rate data of JA2 propellant burned in the double-end configuration to that of a single strand, an increase in the regression rate of about 30% was observed for the pressure range tested. This increase occurred for a certain gap-width range, which was found to be a function of pressure. The enhancement of the burning rate is believed to be caused by the geometric confinement of the flame, which supplied a greater energy feedback to the burning propellant surface.

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