Hydraulic resistance as a mechanism for deflagration-to-detonation transition

A one-dimensional model for premixed gas combustion in a rough tube (or in an inert porous matrix) accounting for the hydraulic resistance and molecular transport is considered. It is shown that the hydraulic resistance causes a gradual precompression and preheating of the unburned gas adjacent to t...

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Bibliographic Details
Published in:Combustion and flame 2000-09, Vol.122 (4), p.492-499
Main Authors: Brailovsky, Irina, Sivashinsky, Gregory I.
Format: Article
Language:English
Subjects:
Applied sciences
Combustion. Flame
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Theoretical studies
Theoretical studies. Data and constants. Metering
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Summary:A one-dimensional model for premixed gas combustion in a rough tube (or in an inert porous matrix) accounting for the hydraulic resistance and molecular transport is considered. It is shown that the hydraulic resistance causes a gradual precompression and preheating of the unburned gas adjacent to the advancing deflagration which leads (after an extended induction period) to a localized thermal explosion triggering an abrupt transition from deflagration to detonation. The paper is an extension of a previous study of the problem, based on a reaction-diffusion-acoustics model, over a fully nonlinear formulation allowing for steepening of compression waves and formation of the shocks.
ISSN:0010-2180
1556-2921
DOI:10.1016/S0010-2180(00)00157-7