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Design of the Stator
It is advantageous to have a row of stationary, or stator, blades downstream of the rotor for both mechanical and aerodynamic reasons. Mechanically, the stator supports the duct. Aerodynamically, it can be designed to remove the rotation imparted to the flow by the rotor; hence it recovers this rotational energy and produces more efficient propulsion.
The flow diagram through the stator is shown in Fig. 9-17. Entering the
stator is the flow that leaves the rotor. The flow leaving the stator is purely axial. Hence the stator imparts the same A и to the flow as the rotor but in the opposite direction. For the stator Vx is simply the resultant of VR and
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Fig. 9-17. Velocity diagram for the stator.
Au/2. Equations (9-27), (9-29), and (9-30), of course, hold for the stator as well as the rotor.
