Two-dimensional numerical simulations of multi-headed detonations in oxygen-aluminum mixtures using an adaptive mesh refinement |
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Authors: | K Benkiewicz K Hayashi |
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Institution: | (1) Department of Mechanical Engineering, Aoyama Gakuin University, 6-16-1 Chitosedai, Setagaya-ku, 157-8572 Tokyo, Japan , JP |
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Abstract: | Abstract. Two-dimensional numerical simulations of detonations in two-phase lean mixtures of aluminum particles and pure oxygen have
been performed. The computational procedure adopts an adaptive mesh refinement methodology in order to increase spatial resolution
in the most interesting parts of the flow field. A one-step heterogeneous reaction describes the evaporation and combustion
of aluminum. Depending on the gas-phase temperature, the combustion product is aluminum oxide or aluminum monoxide. The results
show that the heterogeneous detonations resemble gaseous single-phase ones although the scale of the phenomena is very different.
The detonation of aluminum dust evolves into the 2-headed mode of propagation with the characteristic detonation cell width equal to cm. For aluminum dust the cellular structure is much finer. The detonation initially propagates in the 11-headed mode with the characteristic
cell width equal to cm and evolves into the 8.5-headed mode with the characteristic cell size $\lambda_{\rm cell}$ equal to cm.
Received 7 May 2001 / Accepted 25 March 2002 Published online 23 January 2003
Correspondence to: K. Benkiewicz (e-mail: kbenk@cow.me.aoyama.ac.jp) |
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Keywords: | : Multi-phase flow Detonation Aluminum particles Two-dimensional simulation Adaptive mesh refinement |
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