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International Journal of Energetic Materials and Chemical Propulsion

年間 6 号発行

ISSN 印刷: 2150-766X

ISSN オンライン: 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

HIGH-TEMPERATURE BEHAVIOR OF GRAPHITE UNDER LASER IRRADIATION

巻 9, 発行 3, 2010, pp. 205-218
DOI: 10.1615/IntJEnergeticMaterialsChemProp.v9.i3.20
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要約

Understanding the high-temperature ablative behavior of rocket nozzle materials is crucial for future space propulsion applications. In this investigation, the high-temperature ablative behavior of G-90 grade graphite was studied under CO2 laser irradiation in a helium gas environment with and without hydrogen addition. The objective of this study was to determine if the high-density graphite experiences considerable mass loss at temperatures significantly below its boiling point of 3,915 K. Additionally, understanding the mechanisms that cause the ablation is desired. Mass loss was observed at surface temperatures in excess of 2,100 K for both conditions. The mass loss was minor until the surface temperature reached a value of approximately 2,650-2,700 K. Beyond this point, increased laser energy flux causes an exponential increase of mass loss rate while the surface temperature remained constant. When hydrogen was introduced to the heated sample, acetylene, methane, and ethane were detected by a flame ionization detector. The high measured concentration of acetylene at elevated mass loss rates suggests that the hydrogen is reacting primarily with the pyrolyzed carbonaceous material generated from the sample surface rather than through heterogeneous reactions. The finding of significant mass loss by ablation suggests a new mechanism for nozzle erosion in addition to thermochemical and mechanical erosion.

によって引用された
  1. Qin Fei, Peng Li-Na, Li Jiang, He Guo-Qiang, Numerical Simulations of Multiscale Ablation of Carbon/Carbon Throat with Morphology Effects, AIAA Journal, 55, 10, 2017. Crossref

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