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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

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DIFFUSION FLAME STUDIES OF SOLID FUELS WITH NITROUS OXIDE

Volumen 19, Ausgabe 1, 2020, pp. 73-93
DOI: 10.1615/IntJEnergeticMaterialsChemProp.2020028356
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ABSTRAKT

Counterflow diffusion flame experiments were conducted to investigate hydroxyl-terminated polybutadiene (HTPB) solid fuel combustion under varied pressure environments from 0.1 to 2.2 MPa using nitrous oxide (N2O) as the oxidizer. A numerical model was developed to analyze the flame structure and predict regression rates. Results show solid fuel regression rates to increase with pressure for a fixed oxidizer momentum flux. The flame structure thins due to faster kinetics and shifts toward the regressing fuel surface with increasing pressure. The diffusion flame is positioned on the oxidizer side of the stagnation plane, which also shifted toward the fuel surface with increasing pressure. Flame temperature increases with pressure as well, due to decreasing radical formation, increasing the surface temperature gradient, resulting in enhancement of solid fuel pyrolysis. Heat release from N2O decomposition and pyrolyzed fuel oxidation occurs in two distinct stages at atmospheric pressure, while at elevated pressure (1.83 MPa) the exothermic peak associated with oxidation is distributed over a spatial domain thinner than at 0.1 MPa, but contains many small regions of isolated exothermicities. The flame structure with N2O exhibits a similar structure as O2-HTPB diffusion flames in the spatial regions where N2O was not present because of decomposition. Leakage of O2 and NO into the fuel pyrolysis zone also decreases with increasing pressure. Predicted regression rates with N2O are approximately 34% lower than those with O2 . A comparison of counterflow fuel regression rates with subscale hybrid motor fuel regression rates are in good agreement when the rates are extrapolated based on oxidizer mass flux.

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REFERENZIERT VON
  1. Young Gregory, Connell Terrence L., Fennell Kyle, Possehl Steve, Baier Michael, Examining Port Geometry/Solid Loading for Additively Manufactured Fuels in Hybrid Rockets, Journal of Propulsion and Power, 37, 2, 2021. Crossref

  2. Hendley Coit T., Connell Terrence L., Wilson Daniel, Young Gregory, Catalytic Decomposition of Nitrous Oxide for Use in Hybrid Rocket Motors, Journal of Propulsion and Power, 37, 3, 2021. Crossref

  3. Pace Henry, Massa Luca, Combustion of PMMA in Solid Fuel Scramjet Cavities, AIAA AVIATION 2022 Forum, 2022. Crossref

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