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Accelerative propagation and explosion triggering by expanding turbulent premixed flames

Author(s): Akkerman, V’yacheslav; Chaudhuri, Swetaprovo; Law, Chung K

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Abstract: The dynamics and morphology of outwardly propagating, accelerating turbulent premixed flames and the effect of flame acceleration on explosion triggering are analyzed. Guided by recent theoretical results and substantiated by experiments, we find that an expanding flame front in an externally forced, near-isotropic turbulent environment exhibits accelerative propagation given by a well-defined power law based on the average global flame radius. In this context the limits of the power-law exponent and the effective turbulence intensity experienced by the flame are derived. The power-law exponent is found to be substantially larger than that for the hydrodynamically unstable cellular laminar flames, hence facilitating the possibility of detonation triggering in turbulent environments. For large length scales, hydrodynamic instability is expected to provide additional acceleration, thus further favoring the attainment of detonation triggering.
Publication Date: 2013
Citation: Akkerman, V’yacheslav, Swetaprovo Chaudhuri, and Chung K. Law. "Accelerative propagation and explosion triggering by expanding turbulent premixed flames." Physical Review E 87, no. 2 (2013): 023008.
DOI: 10.1103/PhysRevE.87.023008
ISSN: 2470-0045
EISSN: 2470-0053
Pages: 023008
Type of Material: Journal Article
Journal/Proceeding Title: Physical Review E
Version: Final published version. Article is made available in OAR by the publisher's permission or policy.

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