Turbomachinery

Question 1

Turbine blade differences to compressor based on boundary layer

Answer 1

Boundary layer is much more stable because the pressure is falling and the flow is accelerating

Question 2

Turbine blade differences to compressor based on stage loading

Answer 2

Each stage can have a much higher loading without flow separation

Question 3

Turbine blade differences to compressor based on flow deflection

Answer 3

The flow deflection can be greater than 120deg, and more is good because of Euler work dependence on exit angle

Question 4

Turbine blade differences to compressor based on velocity ratio

Answer 4

The ratio of c2/c1 can be between 2 and 4