Diffusion Flame Stabilization by a Recirculating Flow — Flame Spread Downstream of an Ignition Point

  • M. Konczalla
Conference paper
Part of the Springer Series in Synergetics book series (SSSYN, volume 48)

Abstract

The concept of well-stirred reactors is often employed to discuss flame stabilization by a recirculating flow. Such a treatment is incapable of predicting the properties of the free shear layer outside of the wake, which are important in view of the combustion in the reattached shear layer. In the present analysis an approximation for the flow outside of the wake is proposed which allows one to compute the temperature and concentration fields in the free shear layer. Using Linan’s diffusion flame asymptotics, a parabolic free boundary problem for the flame is derived. It is shown that physically relevant solutions for this problem exist only up to a limited value of the entrance velocity U O. This velocity defines a blow-off velocity for the flame.

Keywords

Combustion Convection Dition 

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Copyright information

© Springer-Verlag Berlin, Heidelberg 1990

Authors and Affiliations

  • M. Konczalla
    • 1
  1. 1.Fakultät für PhysikUniversität BielefeldBielefeld 1Fed. Rep. of Germany

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