Patent ID: 8307655

Claim:
A system, comprising: a gas turbine engine, comprising: a compressor configured to provide compressed air; a combustion chamber configured to combust fuel with the compressed air to generate combustion gas; a turbine configured to be driven by the combustion gas; a transition piece having an interior configured to route the combustion gas from the combustion chamber to the turbine; and an air cooling hood offset from an exterior of the transition piece to define an air cooling passage between the air cooling hood and an exterior of the transition piece, wherein the air cooling hood comprises a plurality of air outlets disposed along the exterior of the transition piece, wherein the plurality of air outlets are non-uniformly sized, non-uniformly spaced, non-uniformly shaped, or a combination thereof, to control the airflow spatially along the exterior of the transition piece, and the plurality of air outlets is configured to expel an airflow from the air cooling passage away from the exterior of the transition piece.