The ornamental design for a turbinerotor, as shown and described.
FIG. 1 is a right side elevational view of a turbine rotor showing my new
design, the left side view being identical when the rotor is rotated
180° on its longitudinal axis;
FIG. 2 is a top plan view of FIG. 1 the bottom plan view being identical
when the rotor is rotated 180 on its longitudinal axis.