M15.15 Power Augmentation Systems Flashcards
Possible methods of reducing power loss
- Increasing engine speed
- Increasing fuel flow
- Increasing air density
System used to augment engine power
- Water methanol
- Water injection
- After burner
What engines use water methanol augmentation
- Turbo-prop
- Turbo-shaft
What engines use water injection augmentation.
Turbo-jets
How can water injection and water methanol be delivered into the engine
- Compressor inlet injection system
- Combustion chamber injection system
How does water injection or water methanol augment power increase air density
Increase air density by cooling the air
How much additional thrust can be produced via water injection or water methanol
10%-30%
What compressor type is compressor inlet injection most suited
Centrifugal compressors
Mixture strength of water methanol
60% water
40% methanol
Advantage of using methanol in compressor inlet injection system
TIT is restored by turning the methanol in combustion, thrust can be restored with out fuel flow adjustment
What is the water methanol control unit sensitive to
- Torque pressure
- Ambient Air pressure
- Engine RPM
How is after-burning achieved
By burning extra fuel in the jet pipe
Types of afterburner ignition
- Ignitor plug
- Catalytic ignition.
- Hot shot ignition
How is catalytic igniter achieved
Creates a flame as the result of fuel/air mixture being sprayed onto a heated element
What metal is used on the heating element of a catalytic ignitor
Platinum/radium element
