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Analysis of flame acceleration induced by wall friction in open tubes
Princeton University.
Princeton University.
Umeå University, Faculty of Science and Technology, Department of Physics.
2010 (English)In: Physics of fluids, ISSN 1070-6631, E-ISSN 1089-7666, Vol. 22, 053606- p.Article in journal (Refereed) Published
Abstract [en]

Spontaneous flame acceleration leading to explosion triggering in open tubes/channels due to wall friction was analytically and computationally studied. It was first demonstrated that the acceleration is affected when the thermal expansion across the flame exceeds a critical value depending on the combustion configuration. For the axisymmetric flame propagation in cylindrical tubes with both ends open, a theory of the initial (exponential) stage of flame acceleration in the quasi-isobaric limit was developed and substantiated by extensive numerical simulation of the hydrodynamics and combustion with an Arrhenius reaction. The dynamics of the flame shape, velocity, and acceleration rate, as well as the velocity profile ahead and behind the flame, have been determined.

Place, publisher, year, edition, pages
2010. Vol. 22, 053606- p.
URN: urn:nbn:se:umu:diva-34353DOI: 10.1063/1.3425646ISI: 000278183000027OAI: diva2:320791
E-pub ahead of print.Available from: 2010-05-27 Created: 2010-05-27 Last updated: 2010-06-08Bibliographically approved

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Bychkov, Vitaly
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