TURBINE SECTION

TM 55-2840-254-23

1-16 TURBINE SECTION

Directs and uses energy created in combustion section to keep compressor rotor turning and for output

power. Includes gas producer and power turbine components. Contains provisions for measuring gas

temperature at input to power turbine assembly. Also contains provisions to contain engine parts in case

of internal engine failure.

CURL ASSEMBLY. Located directly behind air diffuser. Forms outer wall of path for hot gases

leaving combustion section. Smoothly changes direction of hot gases and guides

them to first gas producer nozzle.

FIRST GAS PRODUCER NOZZLE. Located aft of curl assembly and forward of first gas producer

disc assembly. Outer portion forms inner walI of path for hot gases leaving combus-

tion section. Nozzle vanes direct hot gases so they hit first gas producer disc blades

most efficiently.

SECOND GAS PRODUCER NOZZLE. Located between first and second gas producer disc assem-

blies. Nozzle vanes direct hot gases leaving first gas producer disc assembly so they

hit second gas producer disc blades most efficiently.

GAS PRODUCER DISC ASSEMBLIES. Coupled directly to compressor rotor assembly. As hot gases

hit disc assembly blades, disc assemblies turn causing compressor rotor to turn.

POWER TURBINE ASSEMBLY. Contains two disc assemblies, two nozzles, No. 4 and 5 bearing

package and a thermocouple system (see G through L).

TURBINE EXIT VANE. Mounts on rear of engine. Distributes exhaust to lower the effect of thrust.

Also, helps to prevent engine parts from being thrown about should damage occur

internally in power turbine assembly.

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