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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

EXPERIMENTAL STUDY OF TYPICAL DEFECT PROPAGATION PROCESSES IN SOLID ROCKET MOTORS

Volume 5, Edição 1-6, 2002, pp. 360-365
DOI: 10.1615/IntJEnergeticMaterialsChemProp.v5.i1-6.380
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RESUMO

Anomalous combustion of solid propellant grain with defects such as gas cavity, debonding and weak-bond was investigated. A real-time X-ray radiography system (RTR) was used to obtain images of the transient processes of grain structural destruction during static firings. This paper presents the experimental investigation results from some recent test motor firings. Several main factors affecting debond propagation were studied. These include boundary constraint of solid grain, the pressurization rate of ignition, maximum chamber pressure and its duration, geometry and size of the initial debond cavity, combustion characteristics of propellant, and bonding energy of propellant/insulation. Analysis of anomalous combustion and structural destruction of propellant samples with gas cavities was conducted. Many samples with various sizes of gas cavity were fired in a quadrate test motor to analyze the factors of gas cavity propagation. An analysis of dynamic tearing between HTPB propellant and restrictor was performed. The relationship between the tearing speed and the ignition pressurization rate is discussed. The results provide some experimental bases and useful approaches for evaluating combustion safety of solid propellant grain with defects. Some conclusions in the paper were applied to fault diagnosis of some full-scale motor firing test.

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