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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

Indexed in

ACOUSTIC EMISSION OF UNDERWATER BURNING SOLID ROCKET PROPELLANTS

Volume 5, Edição 1-6, 2002, pp. 274-283
DOI: 10.1615/IntJEnergeticMaterialsChemProp.v5.i1-6.290
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RESUMO

Samples of an ammonium perchlorate-based composite solid propellant (AP-HTPB) were ignited and burned in a combustion chamber, filled with water, and pressurized by gas (air or nitrogen) under pressures up to 20 atm. Low frequency (< 3.5 kHz) spontaneous acoustic emission from the combustion process was picked up by a submerged microphone and handled by common electronic circuitry. The acoustic combustion signal was first analyzed in the time domain to obtain information about steady burning rates. Notches purposely cut on the propellant strand can easily be identified by inspecting the sound emission trace. Steady burning rates measured by different acoustic techniques show no appreciable differences with respect to standard techniques (video recording and fuse wires) implemented for combustion under water or nitrogen. The acoustic combustion signal was also studied in the frequency domain and its dependence on mass burning rate experimentally deduced. By a spectrogram analysis, important features of the whole combustion process (including ignition delays, burnouts, and local extinctions) can be studied.

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