Dynamics of Premixed Flames in Narrow Channel with a Step-Wise Wall Temperature Articles uri icon

authors

  • KOURDIOUMOV KOURDIOUMOV, VADIM
  • PIZZA, GIANMARCO
  • FROUZAKIS, CHRISTOS E.
  • MANTZARAS, JOHN

publication date

  • August 2009

start page

  • 2190

end page

  • 2200

issue

  • 11

volume

  • 156

International Standard Serial Number (ISSN)

  • 0010-2180

Electronic International Standard Serial Number (EISSN)

  • 1556-2921

abstract

  • The effect of channel height, inflow velocity and wall temperature on the dynamics and stability of unity Lewis number premixed flames in channels with specified wall temperature is investigated with steady and transient numerical simulations using a two-dimensional thermo-diffusive model. The simplified model is capable of capturing many of the transitions and the combustion modes observed experimentally and in direct numerical simulations in micro- and meso-scale channels, and indicates that the thermal flame/wall interaction is the mechanism leading to the observed flame instabilities. Finally, an ad-hoc one-dimensional model based on the flame-sheet approximation is tested in its capacity to reproduce some of the flame dynamics of the two-dimensional thermo-diffusive model.