Tri-brachial flames around two interactive droplets in flows with fuel vapor

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Abstract

The flame structures around two equal-sized and interactive fuel droplets immersed in high-temperature convective flows are examined. When the flame is sustained between the two droplets while the flow is pure air, an anchor-shape flame structure, namely the tri-brachial flame, is clearly observed. When far-field temperature or ambient equivalence ratio is increased, the flame propagates upstream and the fuel-lean premixed flame withers. However, if the ambient equivalence ratio is high to some extent such as 0.3, two wings of the flame, viz. the fuel-lean and the fuel-rich premixed flames, extend outward from the stoichiometric point. Once the flame encircles the leading droplet, it evolves into a double-flame structure consisting of a front premixed flame and an aft diffusion flame. Accordingly, the impact of the preceding two environmental factors on the droplets' flame structures is outlined.

Original languageEnglish
Pages (from-to)545-554
Number of pages10
JournalInternational Communications in Heat and Mass Transfer
Volume28
Issue number4
DOIs
Publication statusPublished - 2001 May 1

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Chemical Engineering(all)
  • Condensed Matter Physics

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