Pratt-whitney Canada Corp

David Edwin Cowburn

Peter John Stuttaford

Aleksandar Kojovic

Michael Andrew Fryer

Saeid Oskooei

Bernhard Fischer

Stephen Oliver Oikawa

Jeffrey Scott Acton

The present invention is directed to a combustor/turbine successive dual cooling arrangement in which the combustor has a one-piece hot combustor wall and front and rear cold combustor walls, and cooling air is forced under pressure through perforations in the cold combustor walls and impinges on the annular front and rear sections of the hot combustor wall for the backside cooling of the hot combustor wall. The exhaust combustor backside cooling air is directed to gain access to the hot end of the engine, that is, the turbine section, to cool the turbine components. The combustor/turbine successive dual cooling arrangement according to the present invention enables all the air typically used to cool the hot end of the engine downstream of the combustor, to be used as combustor backside cooling as well, to significantly reduce the amount of air needed for combustor and turbine cooling. Moreover, all the exhaust combustor backside cooling air must be used for turbine cooling and is never ingested into the combustion chamber, thereby avoiding negatively affecting the engine combustion emissions.

Combustor turbine successive dual cooling

A premixer for an industrial type gas turbine engine wherein the premixer includes a diffuser ring assembly made up of annular concentric rings and upstream of the diffuser ring assembly in the airflow path is a corresponding fuel manifold ring assembly, each ring in the manifold ring assembly corresponding to a passageway formed between the diffuser rings, and each manifold ring includes a downstream channel for feeding the fuel to the air as the air passes by the ring.

Diffusion mixer

Growing community of inventors

Oakville, Canada

David Edwin Cowburn