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Homogenization Issues in the Combustion of Heterogeneous Solid PropellantsWe examine random packs of discs or spheres, models for ammonium-perchlorate-in-binder propellants, and discuss their average properties. An analytical strategy is described for calculating the mean or effective heat conduction coefficient in terms of the heat conduction coefficients of the individual components, and the results are verified by comparison with those of direct numerical simulations (dns) for both 2-D (disc) and 3-D (sphere) packs across which a temperature difference is applied. Similarly, when the surface regression speed of each component is related to the surface temperature via a simple Arrhenius law, an analytical strategy is developed for calculating an effective Arrhenius law for the combination, and these results are verified using dns in which a uniform heat flux is applied to the pack surface, causing it to regress. These results are needed for homogenization strategies necessary for fully integrated 2-D or 3-D simulations of heterogeneous propellant combustion.
Document ID
20020075559
Document Type
Conference Paper
Authors
Chen, M.
(Illinois Univ. at Urbana-Champaign Urbana, IL United States)
Buckmaster, J.
(Illinois Univ. at Urbana-Champaign Urbana, IL United States)
Jackson, T. L.
(Illinois Univ. at Urbana-Champaign Urbana, IL United States)
Massa, L.
(Illinois Univ. at Urbana-Champaign Urbana, IL United States)
Date Acquired
August 20, 2013
Publication Date
April 1, 2002
Publication Information
Publication: 38th JANNAF Combustion Subcommittee Meeting
Volume: 1
Subject Category
Propellants And Fuels
Funding Number(s)
CONTRACT_GRANT: B341494
Distribution Limits
Public
Copyright
Other

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IDRelationTitle20020075551Analytic Primary38th JANNAF Combustion Subcommittee Meeting
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