The Working Cycle N Airflow

Question 1

Where it is required to convert the energy stored in the combustion gases to velocity energy. What is used

Answer 1

Convergent passage
Nozzle

Question 2

What happens to pressure in a combustion chamber

Answer 2

Remain constant

Question 3

What process is known as Heating at constant pressure.

Answer 3

Pressure of the air does not rise during combustion, like that of a piston engine, but its volume does increase.

Question 4

Working cycle which gas turbine engine functions

Answer 4

Brayton Cycle

Question 5

Convergent Duct
Pressure-
Temperature-
Velocity-

Answer 5

P-decreases
T- decrease
V-increases

Question 6

Divergent Duct
-Pressure
-Temperature
-Velocity

Answer 6

P-increases
T-increase
V-decrease

Question 7

Advantages: The continuous working cycle avoids reprocating parts and high peak pressures to give:

Answer 7

a). Smoother, continuous running engine

b). More power for a given size

c). Use of lightweight combustion chambers and low octane fuels

Question 8

The continuous working cycle avoids reprocating parts and high pressures disadvantage.

Answer 8

a). High flame temperatures

b). Critical component

Question 9

What three components may be seen to rise through the compressor as work is put into the airstream and all three dropping through the turbine as work is taken out.

Answer 9

Pressure
Temperature
Velocity