Figure 1-17.--Can-type combustion chamber.
systems in use. The construction consists of
a housing and liner the same as the can type (fig.
1-18).
The difference between the two is in the liner.
On large engines, the liner consists of an undivided
circular shroud extending all the way around the
outside of the turbine shaft housing. A large one-
piece combustor case covers the liner and is
attached at the turbine section and diffuser
section.
The dome of the liner has small slots and
holes to admit primary air. They also impart
a swirling motion for better atomization of
fuel. There are holes in the dome for the fuel
nozzles to extend through into the combustion
area. The inner and outer liners form the
combustion space. The outer liner keeps flame
from contacting the combustor case. The inner
liner prevents flame from contacting the turbine
Figure 1-18.--Annular-type combustion chamber.
shaft housing.
1-17
