Gas Turbine Final USTH

Fuction of air intake

• Connect the infinite upstream flow to the flow in the compressor inlet.

• Connect the infinite upstream flow to the flow in the turbine inlet with maximum efficiency.

• Connect the infinite upstream flow to the flow in the compressor inlet with maximum efficiency.

  Question 2. - The air intakes suitable for supersonic flight are:

- The air intakes suitable for supersonic flight are:

• "PITOT" air intake: they are convergent in shape.

• 3 Converging-divergent type with variable section.

• 2 "PITOT" air intake: they are divergent in shape.

Air intake type?

• Subsonic Pitot

• Supersonic Pitot

• Conver-Diver

flight regime for the engine

• Subsonic

• Sonic

• Supersonic

Q13. Buzz is

• A thermal phenomenon – interaction chock wave / boundary layer

• A vibratory phenomenon – interaction chock wave / boundary layer 2

• A vibratory phenomenon – interaction normal shock / oblique shock. 3

Question 14.The axial compressor is a dynamic machine that ensures a speed of air flow at the entrance to thecombustion chamber:

• 1 Independent of flight speed.

• 2 Proportionate to flight speed.

• 3 Inversely proportional to the temperature of the flame.

q15/ Grates of stationary blades are

• Rotor

• Generator

• Stator

Q16. A series of fins grids, placed in a flow, constitutes for the fluid that passes through them:

• A series of converging or divergent channels as appropriate

• Its an obstacle

• Venturi nozzle

Q17 In a diverging channel, air particles are decelerated and they arestraightened in the engine axis

• 1 They say the profiles are shock absorbers.

• They say the profiles are straighteners

• They say the profiles are deviant

Q18 In the Newton’s composition of speed where U, V and W aremathematical vector, we can write the following relationship

• Vabsolute = Wrelative + Utraining

• W^2=U^2 +V^2

• Vabsolute + Wrelative + Utraining = 0