15.12 AIR SYSTEMS Flashcards
what will the internal temps of the engine rise to
more then 2200 degrees celcius
to what range will the air cool the engines temp to
800 - 1150 degrees celcius
where is the hottest section of the engine
around the turbine
what zones are turbine engines divided into for isolation and cooling
fan case, intermediate compressor, core engine
what are the temps at the rear stages of the compressor
350 - 400 degrees celcius
what are the two airflows used for cooling the combustion chamber
primary and secondary air
what percentage of air if used for primary cooling of the combustion chamber
20-30%
what 2 ways will the cooling of the combustion chamber take place
cooling air removes heat from combustion liner, cooling air creates a film
to increase the life expectancy of nozzle guide vanes and turbine blades what air is used to cool them
compressor air
what is used for sealing the engine bearing chamber
LP compressor bleed air
what is a secondary function of the compressor
supply air to different systems on the aircraft
name the external systems engine bleed air will be used on
cabin pressurization, de-icing, pneumatic engine starting, auxiliary drive units
for engine cooling, what are the 2 areas below the engine cowling divided into
fan compartment, core compartment
after engine shutdown the engine can bend due to different materials expanding between the upper and lower engine zones, whats this called
bowed rotor
