Abstract
To improve the understanding of flame propagation through a nonpremixed vortex ring, the characteristics of fuel concentration in a vortex ring have been investigated experimentally. The vortex ring was generated by the ejection of propane with a single stroke motion of a speaker. Planar laserinduced fluorescence (PLIF) technique was adopted by seeding acetone as a tracer to fuel stream, in which the PLIF signal intensity is directly proportional to the concentration of acetone. This technique provides non-intrusive and instantaneous measurement of concentration field. Results showed that fuel concentration and its gradient decreased with the evolution of a vortex ring. When a nonpremixed flame propagated through a vortex ring, the flame location coincides with the inner most spiral mixing layer of fuel and air in a vortex ring.
Original language | English (US) |
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Pages (from-to) | 145-152 |
Number of pages | 8 |
Journal | Journal of Visualization |
Volume | 5 |
Issue number | 2 |
DOIs | |
State | Published - 2002 |
Externally published | Yes |
Keywords
- Acetone PLIF
- Flame propagation
- Nonpremixed flame
- Vortex ring
ASJC Scopus subject areas
- Condensed Matter Physics
- Electrical and Electronic Engineering