Combined effects of stretch, curvature, and radiation on the extinction of tubular premixed flames

Zheng Chen, Yiguang Ju

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The combined effects of flame stretch, curvature, and radiation on the extinction of premixed tubular flames are investigated using the large-activation-energy asymptotic analysis. A general theoretical correlation for flame radius, speed, and temperature is obtained and used to study the combined effects on the flame extinction limit. The flame isola for radiative tubular flames is predicted and it is found that both extinction limits are strongly affected by flame curvature. By varying the radiation intensity, various flame bifurcations are predicted and curvature effects are examined. It is shown that the extinction limits can be greatly changed by the change of flame curvature. Furthermore, the effects of Lewis number are examined. The results demonstrate a significant influence of preferential diffusion on the extinction limits of tubular flames at different curvatures.

Original languageEnglish (US)
Title of host publicationCollection of Technical Papers - 45th AIAA Aerospace Sciences Meeting
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
Pages2074-2081
Number of pages8
ISBN (Print)1563478900, 9781563478901
DOIs
StatePublished - 2007
Event45th AIAA Aerospace Sciences Meeting 2007 - Reno, NV, United States
Duration: Jan 8 2007Jan 11 2007

Publication series

NameCollection of Technical Papers - 45th AIAA Aerospace Sciences Meeting
Volume3

Other

Other45th AIAA Aerospace Sciences Meeting 2007
CountryUnited States
CityReno, NV
Period1/8/071/11/07

All Science Journal Classification (ASJC) codes

  • Space and Planetary Science
  • Aerospace Engineering

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