
450 Oxygen-Enhanced Combustion
ame stability problems arise in a quite different way
from air combustion. Unlike air burners, it is not neces-
sary for industrial oxygen burners to use stabilization
devices (ame holders, swirling ows, etc). Therefore,
the rst designs of oxygen burners simply consisted of
concentric tubes inserted in a protective water-cooled
sheath. A practical design is to use two concentric tubes
in order to inject the reactants as two parallel concentric
jets. The mixing of fuel and oxygen is carried out close
to the burner tip by turbulent shear and diffusion of the
two jets. Figure 18.3 illustrates this concept of bu ...