Page 126 - Steam Turbines Design, Applications, and Rerating

Rotors for Reaction Turbines 107

■ Good quality of all highly stressed sections since the small disks can
be more thoroughly forged
■ Simple inspection of the individual pieces before welding and thus
low risk of material defects
■ Favorable heat flow during transient operation with no appreciable
axial stresses at the center of the rotor since only a two-dimensional
stress pattern exists.