The present invention relates to a combustion method and a burner for forming
a flame temperature having a flat temperature distribution which is the same as
that in a case of a long furnace length even if a furnace length is short, and
performs complete combustion. Further, a regenerative burner technique can be applied
even if a furnace length is short. Combustion air whose quantity is less than the
theoretical air quantity or not less than the theoretical air quantity is injected
into a furnace so as to form a jet flow cross section having a larger specific
surface area than that in a case of supplying the same quantity of combustion air
from a circular throat, and fuel is injected toward this air jet flow to cause
the fuel to be rapidly mixed with the air jet flow with strong turbulences before
losing the velocity energy of the fuel. More preferably, an air throat 13
has a flat rectangular opening 13a.
