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International Journal of Energetic Materials and Chemical Propulsion

Publicado 6 números por año

ISSN Imprimir: 2150-766X

ISSN En Línea: 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

Ignition and Combustion Behavior of MTV Igniter Materials for Base Bleed Applications

Volumen 1, Edición 1-6, 1991, pp. 43-61
DOI: 10.1615/IntJEnergeticMaterialsChemProp.v1.i1-6.50
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SINOPSIS

The pyrolysis and ignition characteristics of an igniter material composed of magnesium, Polytetrafluorethylene, and Viton A have been studied using a high-power CO2 laser as the radiative heating source. Methods of analysis and the instrumentation employed were high-speed direct and schlieren photography to visualize the flame structure and gas-phase dynamics, near-infrared photodiodes to obtain ignition delay data, and probe sampling and a gas chromatograph/mass spectrometer to analyze the gaseous products evolved. Important test variables were incident heat flux, chamber pressure, and oxygen concentration. In addition, the effect of boron addition on the ignition behavior of the igniter charge was studied.
Ignition occurred on the sample surface under all test conditions. Experimental results indicated that the ignition delay time decreased monotonically as the incident heat flux was increased. Also, ignition times decreased as the ambient pressure or the ambient oxygen percentage was reduced; it is believed that this decrease is caused by competitive oxygen and fluorine reactions. The direct and schlieren images showed that the burning behavior was also distinctly different as the chamber pressure or oxygen partial pressure was reduced. At low pressures (~ 0.1 atm), no evident luminous plume evolution and gas-phase dynamics were observed during combustion, and the igniter material decomposed in large fragments. In an inert atmosphere, pure PTFE pyrolyzed into many fluorocarbon compounds and Viton A pyrolyzed into a variety of fluorocarbons and hydrofluorocarbons. However, for combustion of the composite MTV material in air and in an inert helium atmosphere, only hydrocarbon compounds, and CO and CO2 for combustion in air, were observed. The addition of boron or Viton A to a basic Mg/PTFE composition significantly lowered the ignition delay time and the addition of boron also greatly enhanced combustion.

CITADO POR
  1. Connell Terrence L., Risha Grant A., Yetter Richard A., Roberts Colin W., Young Gregory, Boron and Polytetrafluoroethylene as a Fuel Composition for Hybrid Rocket Applications, Journal of Propulsion and Power, 31, 1, 2015. Crossref

  2. Connell Terrence L., Risha Grant A., Yetter Richard A., Young Gregory, Combustion of Boron and Fluorocarbon Solid Fuels in a Hybrid Rocket, 49th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, 2013. Crossref

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