Turbine thermal isolation system for micro-turbine alternator

An electrical power generation system, comprising:

• a micro-turbine alternator, comprising:
• a decomposition chamber;
• a turbine comprising blades driven by combustion gases from the decomposition chamber;
• a blower operably connected to the decomposition chamber to provide a blown airflow thereto;
• one or more shafts connecting the turbine to the blower such that rotation of the turbine drives rotation of the blower;
• an electric generator disposed along the one or more shafts such that electrical power is generated via rotation of the one or more shafts;
• and
• a housing enclosing the electric generator within a generator cavity formed therein, wherein the housing includes forward housing and an aft housing, a forward housing end and an aft housing end and cap at the forward housing end, wherein the forward housing is interposed between the cap and the aft housing, wherein the forward housing and the aft housing align to form the generator cavity;
• wherein the blower is configured to blow air through the generator cavity through or around the electric generator, and
• wherein the air exits configured to exit the generator cavity to enter the turbine;
• wherein the forward cap is in a facing spaced relationship with the forward housing forming a radial air passage therebetween, the radial air passage being configured to receive air from the blower;
• and
• wherein the aft housing further comprises:
• a plurality of radially inner aft cooling holes;
• and
• a plurality of radially outer aft cooling holes, radially outward from the plurality of radially inner aft cooling holes.