Turbine Compressors

Question 1

Main purpose of a compressor is

Answer 1

To increase mass flow through engine by pressurising air

Question 2

Stators ensure that air is

Answer 2

Presented at the correct angle to the next set of rotors

Question 3

Across the rotors PVT

Answer 3

Increases

Question 4

Across the stators PT____ and V _____

Answer 4

Increases and decreases

Question 5

Throughout the whole compressor

Answer 5

Velocity remains constant

Question 6

By locating the compressor in a convergent duct

Answer 6

We can preserve the velocity

Question 7

Compressor blades are twisted

Answer 7

To ensure that the rotational velocity remains as similar as possible

Question 8

Compressor stall is a

Answer 8

Partial blockage of air

Question 9

A compressor surge

Answer 9

Is a complete blockage of air flow

Question 10

VIGV adjust their angle

Answer 10

To ensure air is directed into the first stage at the correct AoA

Question 11

Interstage bleed valves

Answer 11

Shit out pressure at the start to improve axial flow across the compressor

Question 12

A main symptom of compressor stall is

Answer 12

A high EGT

Question 13

Rotor blades are fitted in a _____ loosely to ensure they experience

Answer 13

Dove tail fitting
Minimal stress in rotation

Question 14

IGVs are located

Answer 14

After the fat but before the first stage rotor

Question 15

The fan of a high bypass engine is on the same shaft as

Answer 15

The rearmost turbine

Question 16

The AC and pressurisation systems require air and extract this air from the

Answer 16

Compressor

Question 17

Pressure ratio of one stage of a centrifugal compressor is

Answer 17

4:1

Question 18

Compression ratio of a complete axial flow compressor is

Answer 18

35:1