2:1

4:1

61:1

9:1

at the base

at the tip

in the center

between ~ to i of the blade height

heated

compressed air before entering the combustion chamber is heated

bled gas from turbine is heated and readmitted for complete expansion

exhaust gases drive the compressor

equal to zero

in the direction of motion of blades

opposite to the direction of motion of blades

depending on the velocity

reheating

inter cooling

adding a regenerator

all of the above