Compressor Flashcards
Explain the principles of operation of an axial compressor. Comment on pressure, temperature, stagnation pressure and stagnation temperature changes through the compressor.
An axial-flow compressor compresses its working fluid by first accelerating the fluid and then diffusing it to obtain a pressure increase. The fluid is accelerated by a row of rotating airfoils or blades (the rotor) and diffused by a row of stationary blades (the stator).
P,T,P0,T0 all rise
Describe why both rotors and stators are used.
The combination of rotors and stators working together creates a series of compression stages that increase the pressure of the air and gases flowing through the engine. This is necessary to ensure that there is enough pressure and energy to drive the turbine and other components of the engine. Additionally, the use of both rotors and stators helps to improve the efficiency of the engine by reducing losses due to turbulence and other flow disturbances.
How does the pressure drop across a turbine compare to the rise across a compressor in a gas turbine engine?
Pressure drop in core turbines is less than pressure rise in core compressors
Describe, using diagrams, how compressor and turbine blade shapes are influenced by the combination of axial flow and component rotation (Hint: You should
be looking to use velocity triangles).
Slide 304 on MegaPDF
