Combustor heat shield edge cooling
AssigneePratt & Whitney Canada Corp.
InventorSi-Man Amy LAO
Life of this patent
Estimating the term…
Abstract
A combustor heat shield comprises a panel body having a front surface and a back surface. The back surface has rail-less edges and a turbulator band extending inwardly from the rail-less edges. The band includes a plurality of turbulators defining tortuous cooling paths up to the rail-less edges. Effusion holes are distributed over the central area.
Claims20
A combustor heat shield for a gas turbine engine, the combustor heat shield comprising:
- a panel body having a front surface, a back surface and a central area with effusion holes, the back surface having rail-less peripheral edges and a peripheral turbulator band extending inwardly from the rail-less peripheral edges, the peripheral turbulator band including a plurality of turbulators extending from the back face and arranged to define between them tortuous paths up to the rail-less peripheral edges.
A combustor of a gas turbine engine, the combustor comprising:
- a combustor liner defining a combustion chamber, a heat shield secured to the combustor liner inside the combustion chamber, the heat shield comprising a panel body having a front surface oriented internally relative to the combustion chamber and a back surface oriented toward the combustor liner, the back surface having a perimeter band extending inwardly from a rail-less contour of the panel and circumscribing a central area, the perimeter band including staggered rows of turbulators defining tortuous paths across the perimeter band all the way to the rail-less contour, and effusion holes distributed over the central area inwardly of the perimeter band.
A method for cooling a heat shield panel of a combustor of a gas turbine engine, the heat shield panel having a back surface having a perimeter delimited by peripheral edges, the method comprising:
- generating turbulences in a cooling airflow escaping from the peripheral edges of the heat shield panel by forcing the cooling airflow to flow along tortuous paths all the way to the peripheral edges of the heat shield panel.
Dependencies are inferred from the claim text.