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International Journal of Energetic Materials and Chemical Propulsion

Publicou 6 edições por ano

ISSN Imprimir: 2150-766X

ISSN On-line: 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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FLAME STRUCTURE UNDER DOUBLY TRANSCRITICAL AND GASEOUS INJECTION CONDITIONS

Volume 6, Edição 6, 2007, pp. 733-748
DOI: 10.1615/IntJEnergeticMaterialsChemProp.v6.i6.50
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RESUMO

Experiments on coaxial injection of transcritical reactants (liquid oxygen and methane injected at a temperature lower than the critical value, but at a pressure exceeding the critical pressure) indicate that the flame features a nonstandard structure with two light emission regions. The first is located close to the central oxidizer stream, while the second is established near the outer boundary of the fuel. To interpret this unusual result, experiments have been carried out in the same injection geometry, but with gaseous oxygen and methane at atmospheric pressure. This configuration is investigated using light emission and optical multi-channel spectroscopy. It is also found that emission originates from two layers. The inner layer close to the oxygen jet is due to OH* emission, while the outer layer corresponds to CH* and OH* radiation. It is concluded that the mechanisms leading to the double reactive layers in the transcritical and gaseous cases are of a different nature. In the former case, the inner layer corresponds to a flame formed by non-premixed reactants, while the outer layer is probably due to some initial mixing of the injected propellants. In the latter case, the flame is essentially controlled by staged combustion with an initial decomposition of the fuel followed by its oxidation.

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