Sheet 4 - Turbine Ass.

Question 1

Answer 1

Both their temperature and pressure decrease

'’The turbine extracts energy by increasing the velocity of the airflow passing through thus reducing its pressure and temperature’’

Question 2

Answer 2

To increase the velocity of the airflow

'’Turbine Nozzle Guide Vanes are a ring of airfoil shaped vanes designed to produce convergent ducts between individual vanes. This directs and accelerates hot gasses exiting the combustor onto the turbine blades’’

Question 3

Answer 3

To improve efficiency and reduce vibration.

Question 4

Answer 4

High temperature and tensile loading

Question 5

Answer 5

Has no mechanical connection with the other turbine or compressor shafts

Question 6

Answer 6

The inner half is impulse and the outer half is reaction

Question 7

Answer 7

Permanent elongation due to heat and centrifugal force

Question 8

Answer 8

The materials from which the combustion chamber is constructed

Question 9

Answer 9

The gas does equal work along the whole of it’s length