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Mechanisms of ignition by transient energy deposition: Regimes of combustion wave propagation
Stockholm University, Nordic Institute for Theoretical Physics (Nordita). Royal Institute of Technology.
2013 (English)In: Physical Review E. Statistical, Nonlinear, and Soft Matter Physics, ISSN 1539-3755, E-ISSN 1550-2376, Vol. 87, no 3, 033015- p.Article in journal (Refereed) Published
Abstract [en]

Regimes of chemical reaction wave propagating in reactive gaseous mixtures, whose chemistry is governed by chain-branching kinetics, are studied depending on the characteristics of a transient thermal energy deposition localized in a finite volume of reactive gas. Different regimes of the reaction wave propagation are initiated depending on the amount of deposited thermal energy, power of the source, and the size of the hot spot. The main parameters which define regimes of the combustion waves facilitated by the transient deposition of thermal energy are acoustic time scale, duration of the energy deposition, ignition time scale, and size of the hot spot. The interplay between these parameters specifies the role of gasdynamical processes, the formation and steepness of the temperature gradient, and speed of the spontaneous wave. The obtained results show how ignition of one or another combustion regime depends on the value of energy, rate of the energy deposition, and size of the hot spot, which is important for the practical use and for risk assessment. DOI: 10.1103/PhysRevE.87.033015

Place, publisher, year, edition, pages
2013. Vol. 87, no 3, 033015- p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-89717DOI: 10.1103/PhysRevE.87.033015ISI: 000316680000019OAI: oai:DiVA.org:su-89717DiVA: diva2:620225
Funder
EU, FP7, Seventh Framework Programme, 227915
Note

AuthorCount:4;

Available from: 2013-05-08 Created: 2013-05-06 Last updated: 2017-12-06Bibliographically approved

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