AGK Engines - Gas Turbines Designs

Question 1

Single Spool axial flow Turbojet characteristics

Answer 1

Only efficient for high speed flight

Small frontal area produces low drag, ideal for high speed flight

Not used In commercial aviation - inefficient and noisy

Question 2

What does axial flow mean?

Answer 2

Passage of air through the engine directly from front to rear along the engines axis

Question 3

What does a 2 spool bypass mean?

Answer 3

Two rotating assemblies

Question 4

How to calculate Bypass Ratio?

Answer 4

Core Flow

(Total Flow - Core Flow = Bypass Flow)

Question 5

Measuring Station diagram

Answer 5

Question 6

Label 2 Spool Engine

Answer 6

Question 7

Label the 3 Spool Engine

Answer 7

Question 8

Turboprop/Turbo-shaft engines characteristics

Answer 8

Centrifugal compressors used to reduce length

Most of the engird is extracted to produce Torque

Contribution of torque shaft hp and residual thrust can be measured in equivalent shaft horse power (ESHP)

Question 9

Free Turbine is also know as a?

Answer 9

Power Turbine

Question 10

What is a Free Turbine?

Answer 10

Prop driven by LP turbine allowing greater flexibility to operate HP spool

No mechanical link between gas generator and prop turbine

Each element - free to rotate at optimum speed (helps relieve load on engine during start)