Combustion of nanoscale Al/MoO3 thermite in microchannels

S. F. Son, B. W. Asay, T. J. Foley, R. A. Yetter, M. H. Wu, G. A. Risha

研究成果: Article同行評審

149 引文 斯高帕斯(Scopus)

摘要

Microscale combustion is of interest in small-volume energy-demanding systems, such as power supplies, actuation, Ignition, and propulsion. Energetic materials can have high burning rates that make these materials advantageous, especially for microscale applications in which the rate of energy release is important or in which air is not available as an oxidizer. In this study we examine the combustion of mixtures of nanoscale aluminum with molybdenum trioxide in microscale channels. Nanoscale composites can have very high burning rates that are much higher than typical materials. Quartz and acrylic tubes are used. Rectangular steel microchannels are also considered. We find that the optimum mixture ratio for the maximum propagation rate is aluminum rich. We use equilibrium calculations to argue that the propagation rate is dominated by a convective process where hot liquids and gases are propelled forward heating the reactants. This is the first study to report the dependence of the propagation rate with a tube diameter for this class of materials. We find that the propagation rate decreases linearly with 1/d. The propagation rate remains high in tubes or channels with dimensions down to the scale of 100 μm, which makes these materials applicable to microcombustion applications.

原文English
頁(從 - 到)715-721
頁數7
期刊Journal of Propulsion and Power
23
發行號4
DOIs
出版狀態Published - 2007

All Science Journal Classification (ASJC) codes

  • 航空工程
  • 燃料技術
  • 機械工業
  • 空間與行星科學

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