Study on the Stability of Diffusion Flame Anchored at the Impinged Point between an Air Stream and a Combustible Gas Stream : Part 1, On the Velocity and Concentration Profiles

摘要

The stability of a diffusion flame anchored at impinged point at right angle between air and fuel gas was studied. The stability of the flame may be affected by the flow and mixing field between fuel and oxidizer in the vicinity of the burner port where the flame attaches. To make such circumstances clear, velocity and concentration profiles were studied experimentally using a cold model. Results were as follows : (1) In the vicinity of the burner port, a pair of recirculation zones could be found out. And in the circulation zone, velocity was so small that the zone itself was not so effective as to control the profile outside of the zone. (2) In the outer region of this zone, the dimensionless velocity and concentration profile could be obtained.