Floatwall dilution hole cooling
AssigneePratt & Whitney Canada Corp.
InventorsRobert Sze, Jeffrey Richard Verhiel
Life of this patent
Estimating the term…
Abstract
A combustor for a gas turbine engine is provided, the combustor having an outer shell with an outer surface exposed to cooling air and an inner surface, and at least one floatwall panel attached to the inner surface of the outer shell and having a trailing edge. At least one dilution hole is in the floatwall panel near the trailing edge and in communication with the outer surface of the outer shell, and at least one local air impingement hole is in the outer shell downstream of each at least one dilution hole, that directs the cooling air towards the trailing edge of the floatwall panel.
Claims12
A gas turbine combustor, within a plenum containing pressurized cooling air at a plenum pressure, the combustor comprising:
- an outer shell having an outer surface exposed to the pressurized cooling air and an inner surface exposed to combustion gases at a pressure lower than the plenum pressure;
- at least one floatwall panel, the floatwall panel attached to the inner surface of the outer shell and having a trailing edge having a downstream facing surface;
- at least one dilution hole in the floatwall panel near the trailing edge and in communication with the outer surface of the outer shell;
- and
- at least one local air impingement hole in the outer shell downstream of each at least one dilution hole and of the trailing edge downstream facing surface, directing the pressurized cooling air through the outer shell directly from the plenum at about the plenum pressure only at the downstream facing surface of the trailing edge of the floatwall panel, without the pressurized cooling air passing through any other passage other than the at least one local air impingement hole.
A gas turbine engine having a combustor, within a plenum containing pressurized cooling air at a plenum pressure, the combustor comprising:
- an outer shell having an outer surface exposed to the pressurized cooling air and an inner surface exposed to combustion gases at a pressure lower than the plenum pressure;
- at least one floatwall panel, the floatwall panel attached to the inner surface of the outer shell and having a trailing edge having a downstream facing surface;
- at least one dilution hole in the floatwall panel near the trailing edge and in communication with the outer surface of the outer shell;
- and
- at least one local air impingement hole in the outer shell downstream of each at least one dilution hole and of the trailing edge downstream facing surface, directing the pressurized cooling air through the outer shell directly from the plenum at about the plenum pressure only at the downstream facing surface of the trailing edge of the floatwall panel, without the pressurized cooling air passing through any other passage other than the at least one local air impingement hole.
Dependencies are inferred from the claim text.