Dome for a thermodynamic apparatus

A one-piece dome for a thermodynamic apparatus wherein:

• the dome has a plurality of channels on a convex surface of the dome;
• the dome has a plurality of internal passages defined in the dome;
• a plurality of orifices is defined on a concave surface of the dome with a first end of the plurality of passages fluidly coupled with an associated orifice;
• and
• a second end of the plurality of internal passages fluidly couple to a regenerator disposed within a housing.

A method to manufacture a dome for a thermodynamic apparatus, comprising:

• fabricating a core for the dome;
• placing the core into a box having material inside that follows the shape of the outer surfaces of the dome;
• pouring molten material into the voids in the box;
• allowing the molten material to solidify to form the dome;
• removing the material out of spaces within the dome and from the outer surfaces of the dome;
• and
• finish machining wherein:
• the dome has a plurality of channels on an outer, concave surface of the dome;
• the dome has a plurality of internal passages defined within the dome;
• a plurality of orifices is defined on a convex surface of the dome with a first end of the plurality of passages fluidly coupled with an associated orifice;
• the passages are arranged within the dome in a hemispherically spiraling fashion;
• and
• the channels are arranged on the surface of the dome in a hemispherically spiraling fashion;
• and one of the passages and the channels spiral counterclockwise and the other of them spiral clockwise.