Air System Flashcards
What effect will pneumatic anti-icing have on the operation of the engine?
It will reduce the amount of air being used as thrust
Which compressor is protected by the variable bleed valves?
LP
What is the motive power used to operate the clearance control valves?
Fuel pressure
What air source is used for sealing the bearing compartments?
LP
What is the purpose of the bleed valves fitted at the mid or aft stages of a HPC?
To control the acceleration
What is used for active clearance control on a compressor and why?
Warm air control valves to manage the rate of cooling or expansion of the blades and case
Where is the internal air system of an engine?
Sealing and cooling air
Why is internal air used for multi-tasking?
To keep the engine as fuel efficient as possible with this airflow
Where is sealing air from the bearings disposed?
Vented over board via the N1 shaft
What is the source of the external cooling of the core compartment?
Fan
What is the method of cooling on the ground on shut-down?
Convection cooling
What is a bowed rotor?
When the thermal contraction leaves the rotor in a irregular shaper such as the bottom drooping down
