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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

ZERO-DIMENSIONAL UNSTEADY INTERNAL BALLISTIC MODELING

Volumen 5, Ausgabe 1-6, 2002, pp. 1059-1071
DOI: 10.1615/IntJEnergeticMaterialsChemProp.v5.i1-6.1080
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ABSTRAKT

Design of solid rocket motors requires theoretical models for prediction/test analysis having particular characteristics of effectiveness and short computation time, especially when these models are used for statistical calculations as scattering analysis or thrust imbalance evaluation between two coupled flight boosters. To this purpose, a specific internal ballistic model was developed and it is under validation at Fiat Avio-BPD with the following requirements: 1) the flow field solution in the propellant grain channel is obtained considering mass adduction, port area change, erosive burning, and different burn rate for each motor segment; 2) the motor ignition transient is described under unsteady conditions in the simplest way taking into account igniter mass flow rate, flame spreading, and chamber filling. These two requirements were properly combined through: 1) a steady-state solution of the propellant grain flow channel with a convenient linear combination of simple one dimensional flow in integral form (thus allowing Mach number, pressure, propellant mass flow rate, burn rate, etc. along the motor axis to be calculated); 2) unsteady internal ballistic model based on zero-dimensional operating conditions. Pressure, temperature, burn rate, and chamber volume are integrated in time taking into account the effective pressure and burn rate values obtained from the previous point 1 by means on iterative process. A good match was obtained during ignition transient and steady-state phase comparing the obtained results with more sophisticated models, and also with experimental measurements.

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