Effect of initial conditions on flame-vortex interactions

C. A. Womeldorf, O. M. Knio, H. N. Najm

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The effects of initial conditions on the interaction between a premixed methane-air flame and a counter-rotating vortex pair were analyzed computationally. The vortex pair propagated from the reactant side into the initially-flat front due to its own self-induced propagation velocity. This propagation resulted in large-scale deformation of the flame as it was displaced by and then wrapped around the vortex cores. When the mixture conditions in the vortex cores were identical to those of the reactants, and regardless of the initial strength of the vortex cores, of the initial core radius to separation ratio, or of the initial core temperature, a gradual decrease in peak concentrations of CH and OH was observed along the centerline. The rate of decay and its plateau were dependent on the initial vortex structure and induced velocity. In contrast, when the vortex core initially contains a leaner mixture, a qualitatively different response of the flame structure was obtained. A steep increase in peak CH and OH concentrations along the flame centerline was observed. This is an abstract of a paper presented at the 30th International Symposium on combustion (Chicago, IL 7/25-30/2004).

Original languageEnglish (US)
Title of host publication30th International Symposium on Combustion, Abstracts of Work-in-Progress Poster Presentations
Pages346
Number of pages1
StatePublished - 2004
Externally publishedYes
Event30th International Symposium on Combustion, Abstracts of Works-in-Progress Poster Presentations - Chicago, IL, United States
Duration: Jul 25 2004Jul 30 2004

Other

Other30th International Symposium on Combustion, Abstracts of Works-in-Progress Poster Presentations
CountryUnited States
CityChicago, IL
Period07/25/0407/30/04

ASJC Scopus subject areas

  • Engineering(all)

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