panel is considered part of the enclosure, and it is
The rotating assembly is mounted within a support
assembly and containment ring. It is enveloped by a
physically located in the operator's compartment.
c o m bu s t i o n c o l l e c t o r m a n i f o l d a n d a p l e n u m
Turbine Section
assembly. The manifold incorporates six ducts, which
mate with six combustion chamber liners. The plenum
The turbine assembly section consists of a rotating
assembly fits over the manifold and has six ducts that
assembly, housing, plenum, and combustion chamber
envelope the combustion chamber liners. The six
components. The rotating assembly includes a radial
combustion cap assemblies are attached to the plenum
turbine wheel and shaft assembly with an axial turbine
assembly ducts.
wheel mounted on the radial wheel shaft. A shroud is
The engine uses six combustion chambers of the
over the radial wheel; a nozzle is in front of the axial
reverse flow can type, equally spaced axially around
wheel; pressure-lubricated bearings and bearing
the turbine section (fig. 12-15). The turbine plenum
housings are on each end of the assembled wheels.
and the attached combustion cap assemblies constitute
Seals are installed between the wheels and adjacent
the outer shell of the combustion chambers. The
bearings to prevent leakage of lubricating oil into the
combustion collector manifold ducts connect to the
discharge end of the combustion chamber liners and
4
3
2
1
5
6
8
7
ASf12015
1.
Collector manifold assembly
5.
Atomizer assembly (rotated for clarity)
2.
Liner assembly
6.
Cap assembly
3.
Plenum assembly
7.
Clamp
4.
8.
Crossfire tube
Figure 12-15.--Combustion chamber construction.
12-17