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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

ON THERMOCHEMICAL CHARACTERISTICS OF AP/NSAN/HTPB COMPOSITE PROPELLANTS

Volumen 4, Edición 1-6, 1997, pp. 118-128
DOI: 10.1615/IntJEnergeticMaterialsChemProp.v4.i1-6.140
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SINOPSIS

The first part of the work concerned the evaluation of the environmental impact of ammonium perchlorate / non-stabilised ammonium nitrate / hydroxyl terminated polybutadiene composite propellants and determination the HCl concentration in the combustion products of the propellants. The results, obtained by electrometry and precipitation titration, were compared with those obtained with a numeric code that allows to consider up to m (m < 20) reacting atomic species and the possibility of formation of n (n < 40) chemical components, by combination of the m atomic specks. There is good correlation between experimental and theoretical values. The influence of non-stabilised ammonium nitrate content on linear regression rates of the propellants was assessed. The experimental results, obtained in a classic Crawford bomb by the fuse wires method, allowed the determination of the Vr (P) evolution of the formulations. The ignition delay, τi, of the formulations was also studied. Small test samples of the propellants were submitted to radiative beating in an electrical furnace. The ignition instant was determined by the simultaneous obtainement of a sharp rise of the output of a thermocouple and a minimum surface temperature. The analysis of the results showed that increasing weight content of non-stabilised ammonium nitrate originates shorter values of τi. Further interpretation showed that the evolution of in τi, could be described in two linear Phases. The transition temperatures between Phases were calculated, and the results obtained showed that partial substitution of ammonium perchlorate by non-stabilised ammonium nitrate increased the domain of occurrence of homogeneous ignition.

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