Combustion Turbine Including a Diffuser Section with Cooling Fluid Passageways and Associated Methods

A diffusion section for a combustion turbine comprising:

• an outer wall, an inner wall, and at least one strut member extending therebetween;
• said outer wall having at least one first gas passageway therein;
• said inner wall having at least one second gas passageway therein;
• said at least one strut member having at least one third gas passageway therein;
• the at least one first, second and third gas passageways delivering gas therethrough to assist attachment of a boundary layer to adjacent surfaces of said outer wall, said inner wall, and said at least one strut, respectively.

A method of making a diffusion section for a combustion turbine so that surfaces of the diffusion section have enhanced attachment of a boundary layer adjacent thereto, the diffusion section comprising an outer wall, an inner wall, and at least one strut member extending therebetween, the method comprising:

• forming at least one first gas passageway in the outer wall;
• forming at least one second gas passageway in the inner wall;
• forming at least one third gas passageway in the at least one strut member;
• and
• configuring the at least one first, second, and third gas passageways to deliver gas therethrough to thereby provide enhanced attachment of a boundary layer to adjacent surfaces of the diffusion section.