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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

Indexed in

CHARACTERIZATION OF BLACK-POWDER IGNITER JETS INTO A GRANULAR BED THROUGH ANALYSIS OF CONDENSED-PHASE PRODUCT DEPOSITION AND REGIONS OF PENETRATION

Volumen 9, Edición 6, 2010, pp. 505-522
DOI: 10.1615/IntJEnergeticMaterialsChemProp.2011001422
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SINOPSIS

Understanding the detailed ignition, flame-spreading, and combustion processes that take place inside a granular solid-propellant bed is vital for accurate interior ballistic modeling, and for the development of ballistic propulsion systems as a whole. Two experiments were conducted to investigate the penetration characteristics of igniter jets (produced by the combustion of a percussion primer and black-powder pellet) typical of those found in ballistic propulsion systems. The first experiment utilized both live and inert propellant, in conjunction with high-speed photography and photodetectors, to examine the penetration of igniter jets discharging radially into the propellant bed from two diametrically opposite vent holes. These tests show that the igniter jets fully penetrate the granular bed before any significant ignition and combustion of the granular solid propellant occurs. During the second experiment, a singular igniter jet was discharged axially into an inert granular bed, which simulated the geometric properties of live granular propellants. This setup was designed to study the region of particles coated by the condensed-phase products of the igniter jet. This information is very useful since the ignition behavior of live propellants is dependent upon both convective heating by the igniter jet as well as conductive heating by the deposited condensed-phase products. Equilibrium analysis predicts that these condensed-phase products contain potassium species. This was confirmed by collecting the inert granular particles and analyzing them with energy dispersive x-ray spectroscopy (EDS). Three correlations were developed that describe the region of the granular bed coated by the condensed-phase products from the igniter jet; these include: (1) the axial depth of penetration, (2) maximum radial penetration, and (3) the volume of the coated region. These parameters were found as functions of the Reynolds number based on the jet-orifice diameter, the pressure ratio of the igniter chamber to the ambient condition, and the ratio of particle diameter to jet-orifice diameter.

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