Extinction of spherical diffusion flames in the presence of radiant loss

摘要

In this paper we examine the structure and extinction characteristics of burner-generated spherical diffusion flames.Two important parameters in this problem are the dimensional ess mass flow rate,a ratio of fuel injection veloicty to diffusion velocity,and the Damkohler numeber,which is porporational to the surface area of he bruner,the fuel ocncentration in the feeding stream,and the ambient pressure.Both parameters can be easily controlled in an experiment.Particular attention is given in this study to the effects of gas-phase radiation either from soot or from combustion products and intermediatie species.