Question: The figure below shows a nozzle vane and a rotor blade for an axial flow gas turbine stage. The blade speed is (800 mathrm{ft} /

The figure below shows a nozzle vane and a rotor blade for an axial flow gas turbine stage. The blade speed is $800 \mathrm{ft} / \mathrm{s}$. The absolute velocity leaving the stage is identical to the absolute velocity entering the stage and both are purely in the axial direction.

(a) Draw and label the velocity diagrams. Show values for all three velocities and the absolute and relative angles on each diagram.

(b) Calculate the work per unit mass for this stage.

Figure P12.70

30 U = 800 ft/s 40

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