Combustion Flashcards
1
Q
Purpose of Combustion Chamber
A
Burns fuel in air supplied by compressor
Heat released uniformly, smoothly
Minimum loss of pressure and maximum release of heat.
2
Q
Advantages of an Annular Chamber
A
Reduced thermal stress on turbine
Thermal load distribution on the HP turbine is more faourable.
3
Q
Purpose of a Diffuser
A
Decreases the flow velocity for combustion
Pressure rises, velocity falls.
4
Q
How many igniter plugs are found?
A
2 igniter plugs
5
Q
Duplex Nozzle
A
Swirl vanes reduce average axial flow speed in order to stabilise flame front.
Generate a swirl of incoming air to enhance mixing of fuel with air.
6
Q
Ignition Units
A
High energy, similar to spark plug
25000V
GND/CONT/FLT modes
7
Q
Drain Valve
A
Removes unburned fuel from the combustion chamber.
