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International Journal of Energetic Materials and Chemical Propulsion

Erscheint 6 Ausgaben pro Jahr

ISSN Druckformat: 2150-766X

ISSN Online: 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

BORON PROPELLANTS FOR DUCTED ROCKET APPLICATION

Volumen 2, Ausgabe 1-6, 1993, pp. 361-374
DOI: 10.1615/IntJEnergeticMaterialsChemProp.v2.i1-6.210
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ABSTRAKT

A research program was conducted to optimize the processability and evaluate the properties of fuel-rich solid propellants heavily loaded with boron. Propellants containing large amounts of boron pose specific problems. Good manufacturing and mechanical properties require definition of the specifications for the raw material, and development of a method for the mixing operation. The maximum stress is usually between 1.4 and 2.5 MPa, and the strain at maximum stress between 35 and 50 %.
The computed volumetric specific impulses are between 1600 and 1800 s g cm−3 for a flight at Mach 2 and sea level, with a chamber pressure equal to 0.57 MPa and an equivalence ratio of 0.4. Ballistic evaluations were performed by firing end-burning grains. A large burning rate range is achieved by varying the ammonium perchlorate particle size and the ballistic catalyst content. This allows operation in the choked gas generator or in the unchoked gas generator configuration. The burning rate required at the operating pressure is between 8 and 15 mm/s for an end-burning grain. The unchoked gas generator configuration demands high burning rate propellant because of the low operating pressure. These compositions produce no combustion residue, but leave slag in the gas generator, with a mass corresponding to less than 1 % of the initial mass of the grain.

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