09-08-2012, 03:18 PM
AERO ENGINES
AERO ENGINES.ppt (Size: 2.69 MB / Downloads: 44)
AIR CRAFT ENGINES
An aircraft engine is the component of the propulsion system for an aircraft that generates mechanical power.
Aircraft engines are almost always either lightweight piston engines or gas turbines
FUEL
WHY AIRCRAFT TURBINE FUEL(AVIATION GASOLINE)
HIGH OCTANE NUMBER
HIGH COMPRESSION RATIO
HIGH power output and efficiency at higher altitudes
Freezing point is -50 deg cel (K50)
turbofan
A. Low pressure spool
B. High pressure spool
C. Stationary components
1. Nacelle
2. Fan
3. Low pressure compressor
4. High pressure compressor
5. Combustion chamber
6. High pressure turbine
7. Low pressure turbine
8. Core nozzle
9. Fan nozzle
ADVANTAGES
High thrust at low air speed
Short take off distance
Less noise than turbojet
Disadvantages
Higher specific weight
Larger frontal area
Inefficient at higher altitudes