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Self-similar accelerative propagation of expanding wrinkled flames and explosion triggering
Princeton University.
Princeton University.
Umeå University, Faculty of Science and Technology, Department of Physics.
2011 (English)In: Physical Review E, Statistical, nonlinear and soft matter physics, ISSN 1539-3755 (print), 1550-2376 (online), Vol. 83, 026305- p.Article in journal (Refereed) Published
Abstract [en]

The formulation of Taylor on the self-similar propagation of an expanding spherical piston with constant velocity was extended to an instability-wrinkled deflagration front undergoing acceleration with RF∝tα, where RF is the instantaneous flame radius, t the time, and α a constant exponent. The formulation describes radial compression waves pushed by the front, trajectories of gas particles, and the explosion condition in the gas upstream of the front. The instant and position of explosion are determined for a given reaction mechanism. For a step-function induction time, analytic formulas for the explosion time and position are derived, showing their dependence on the reaction and flow parameters including thermal expansion, specific heat ratio, and acceleration of the front.

Place, publisher, year, edition, pages
American Physical Society , 2011. Vol. 83, 026305- p.
Identifiers
URN: urn:nbn:se:umu:diva-39995DOI: 10.1103/PhysRevE.83.026305OAI: oai:DiVA.org:umu-39995DiVA: diva2:397306
Available from: 2011-02-14 Created: 2011-02-14 Last updated: 2011-02-15Bibliographically approved

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Bychkov, Vitaly

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