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- W329473692 abstract "In swirling flames, a flashback in the core flow can occur, although the turbulent flame speed may be substantially smaller than the approach flow velocity. As opposed to turbulent flame propagation, this mechanism is driven by the interaction of heat release with vortex aerodynamics, leading to a transition of vortex breakdown (VB) characteristics. As a result, the VB propagates upstream with an accompanying propagation of the flame. The mechanism is generally referred to as combustion-induced vortex breakdown (CIVB). In the first section of the chapter, flame propagation mechanisms in generic vortex flows are presented. In the second section, CIVB-driven flashback in gas turbine combustor-relevant geometries is discussed. The basic CIVB mechanism seems to relate with the expansion of the vortex core, which can be characterized by the burned-to-unburned temperature ratio, without kinetics playing an explicit role. However, even if a flashback is triggered by CIVB, for an upstream flame propagation to occur, it is necessary that the reactions are not extinguished in the mixing tube. Thus, flame quenching appears as a phenomenon that guards against CIVB-driven flashback, through which reaction kinetics come into play, as discussed in the third section." @default.
- W329473692 created "2016-06-24" @default.
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- W329473692 date "2015-01-01" @default.
- W329473692 modified "2023-09-23" @default.
- W329473692 title "Combustion-Induced Vortex Breakdown–Driven Flashback" @default.
- W329473692 doi "https://doi.org/10.1016/b978-0-12-800755-6.00009-x" @default.
- W329473692 hasPublicationYear "2015" @default.
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