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Lift-off Behavior and Flame Structure of Interacting Edge Flames

Authors: Amit Wason; William Carnell; Meghan Quinn; Michael Renfro;

Lift-off Behavior and Flame Structure of Interacting Edge Flames

Abstract

Laminar lifted edge flames stabilized above a five-exit slot burner are examined experimentally and numerically. In the present study, partially-premixed methane and air are used in the three-central slots to produce two neighboring edge flames. By controlling the equivalence ratios in the slots, the separation distance between the interacting edge flames is altered. The interaction between the flames is strong enough to prevent the two edges from stabilizing at the same lift-off height, and the separation distance between the edges is found to depend on the total flow rate. In each case studied, multiple stable flame configurations are observed. Particle imaging velocimetry measurements indicate that the divergence around the lower flame edge causes the upper flame to stabilize at an angle and at a velocity larger than the laminar flame speed, presumably due to heat interaction. For very large separation distances, the divergence around the lower flame engulfs the upper flame. Simulations of the same conditions show that the trailing diffusion flame is quenched in the latter case.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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