Electric power generation using power turbine aft of LPT

A system for generating electrical energy comprising:

• an engine, the engine having a high pressure turbine, a low pressure turbine, an aft turbine and a discharge flow;
• a generator disposed aft of the low pressure turbine, the generator comprising:
• a stator core comprising a plurality of stator coils mounted in recesses in the stator core, wherein the plurality of stator coils and stator core are substantially static;
• and a rotor core comprising a reluctance-type core comprised of magnetically-permeable material without windings, wherein the rotor core is mechanically coupled to the aft turbine;
• wherein the rotor core being disposed circumferentially around the stator core and the plurality of stator coils, thus eliminating cooling requirements for the rotor and eliminating or simplifying cooling attributed to the inner stator;
• a duct arranged in serial flow communication with the low pressure turbine;
• and
• a variable nozzle disposed in the duct;
• wherein the variable nozzle controls the flow in the duct, and wherein the flow in the duct provides excitation to the rotor core and channels flow in the duct to bypass the generator.