Abstract
The interaction of a spark-ignited laminar premixed flame kernel with a vortex toroid was studied to quantify the transient coupling of flame chemistry and stretch in both methane-air and propane-air flames. Three vortex strengths, corresponding to different rotational or translational velocities, were chosen to interact with the growing flame surface. In the weakest flames, the strongest vortex had the ability to penetrate all the way through the flame kernel and essentially initiate a second propagating flame, which was connected to the original flame surface. The added ability to control the relative timing of the spark ignition and vortex generation allows a multitude of different interactions to be observed for a given set of experimental parameters. The effect of the vortex greatly augmented flame propagation in these laminar premixed flames with both local and global extinction possible under certain conditions. The core-to-core vortex diameter was ≈ 13 mm. One interesting observation in the rich propane-air flame was the cellular structure that develops due to instabilities at ignition. This is an abstract of a paper presented at the 30th International Symposium on combustion (Chicago, IL 7/25-30/2004).
| Original language | English (US) |
|---|---|
| Title of host publication | International Symposium on Combustion, Abstracts of Works-in-Progress Posters |
| State | Published - Jan 1 2004 |
| Externally published | Yes |