The turbomachinery geometry is typically provided by one of the following cells:
Blade Design cell of a BladeGen system
Geometry cell of a Geometry or Mesh or Throughflow system
This can be based on an upstream Blade Design cell.
If you want to pass the geometry to the Turbo Mesh cell of a TurboGrid system, you must use BladeEditor to export to Ansys TurboGrid. For details, see Export to Ansys TurboGrid in the TurboSystem User's Guide.