Gas Turbine Design Flashcards
What is it called when a compressor and a turbine are on a single shaft
A spool
Where is the highest pressure in the engine located?
Diffuser compressor outlet.
What P’s represent the overall pressure ratio?
P3/p1
What is the opening of an engine (p)
P1
What is the diffuser compressor p?
P3
What p is the end of the engine?
P8
What is the epr ratio in p’s?
P8/p1
What is the name for the front blades on an engine?
Compressor
Which is faster N1 or N2?
N2
Is N1 high pressure or low pressure?
Low
Is N2 high pressure or low pressure?
High pressure.
Total flow - core flow = x
Bypass flow
How do you calculate the bypass ratio?
Bypass/coreflow
If you look into the back end of an engine, will you see a high pressured or low pressured spool?
Low
What is the air amulus?
Narrowing of the engine.
The turbine in a gas turbine engine generates shaft power using… expansion/compression turning blank into mechanical energy
Expansion - kinetic energy
The primary reason for a limitation being imposed on the temperature of the gas flow in a gas turbine engine is to…ensure that the maximum acceptable temperature of the turbine nozzle blank blank is not exceeded.
Guide vanes
The diffuser in a centrifugal compressor is a device in which the…pressure and temperature increases/decreases
Increases.
The disadvantages of axial flow compressors compared to centrifugal flow compressors are that they… more blank
Expensive
