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International Journal of Energetic Materials and Chemical Propulsion

Publication de 6  numéros par an

ISSN Imprimer: 2150-766X

ISSN En ligne: 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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Computer Codes for Ballistic Performance Calculations of Base Bleed Propellant Grain

Volume 1, Numéro 1-6, 1991, pp. 107-124
DOI: 10.1615/IntJEnergeticMaterialsChemProp.v1.i1-6.90
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RÉSUMÉ

Concerning shell external ballistics, different technical solutions are studied in order to improve aerodynamic performance of a shell. The solution named base bleed consists of injecting a hot gas at a low velocity into the depressional flow area. Preliminary design of a base bleed propellant grain has to satisfy requirements generally expressed as a shell range increase against available grain volume. In order to adapt the propellant grain ballistic performance to the shell trajectory conditions, two different investigations have been developed. The first investigation is essentially theoretical and consists of computer simulations of the flowfield near the shell base with and without effect of subsonic injection. The second investigation is more empirical and consists of analysing the shell velocity evolution by means of radar measurements in order to determine drag reduction factor due to the base bleed effect. The organization of the developed ballistic computer codes and some results are described in this paper. The results of the two studies give ballistic data necessary for simulations of base bleed shell trajectories.

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