Combustion Section

TM 55-2840-254-23

Attaches directly to air diffuser assembly and fits around major portion of turbine section. Provides area

for combustion and air expansion. Also has provisions for draining overboard unburned fuel left in com-

bustor housing.

COMBUSTION CHAMBER HOUSING. Forms outer wall and is major support for combustion

section and power turbine. Provides mounting surfaces for main fuel manifold,

fire shield, flow divider, spark igniters, and start fuel nozzles.

COMBUSTION CHAMBER LINER. Mounts inside combustion chamber housing. Contains holes

to let a controlled amount of air to enter the liner. Fuel is also fed into the

liner where combustion takes place.

COMBUSTION CHAMBER VANES. Mount in combustion chamber housing. Work in conjunction

with straightening vanes in air diffuser to remove air swirl and distribute air

properly in combustion section.

DRAIN VALVE ASSEMBLY. Two, mounted at bottom of combustion chamber housing. Spring

normaly holds valve open. With engine running, internal engine pressure pushes

valve closed. With engine stopped, valve opens and unburned fuel in combus-

tion chamber housing drains out.

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