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Flashcards in Axial Compressor Aerodynamics Deck (10)
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1

What is the stage of an axial compressor?

Stage = Rotor and Stator

2

What does more stages result in?

A greater pressure ratio

3

What is a way of increasing pressure ratio?

Make each stage work harder

4

What is the working fluid accelerated by?

Rotor

5

What is the working fluid decelerated by

Stator

6

Where does deceleration occur?

Deceleration occurs in stator and in the relative frame of rotor (i.e. if you are sitting on the rotor blades spinning round)

7

Why is aerofoil design critical?

To avoid stall

8

What's the definition of reaction?

The ratio of static enthalpy rise in rotor to static enthalpy rise in stage

9

Why is the reaction important?

If it turns negative, a compressor will act as a turbine and a turbine will act as a compressor. Not ideal!

10

What are some causes of stall?

Damaged compressor components caused by ingestion of foreign objects
Worn or contaminated components such as eroded rotor compressor blades and seals
Dust and dirt in the compressor can reduce its efficiency and lead to a stall if the contamination is severe enough