(Solved): Q3. The figure shows a cross-section through a few of the stator and rotor blades of a single stag ...

Q3. The figure shows a cross-section through a few of the stator and rotor blades of a single stage high-pressure steam turbine. The steam leaves the fixed stator blades at an angle of 115° with the z-axis, as indicated. The inlet and outlet blade angles are equal (a = a?), and the relative velocity at the inlet and at the outlet is aligned with the blade angle. The hub and tip radii of the blades are 0.295 m and 0.347 m respectively and the rotational speed is 3000 rpm. The steam mass flow rate through the turbine is 492.2 kg/s and the inlet pressure and temperature are 15 MPa and 500°C respectively. (i) (ii) (iii) k 115? 3 17 marks 21 Draw the inlet velocity triangle and determine the blade angle at the inlet a?. Draw the outlet velocity diagram and determine the outlet whirl velocity vee. Determine the power output onto the shaft.