US 12,247,738 B2
Convection cooling at low effusion density region of combustor panel
Fumitaka Ichihashi, Unionville, CT (US); and Jeffrey J. Lienau, Wethersfield, CT (US)
Assigned to RTX CORPORATION, Farmington, CT (US)
Filed by United Technologies Corporation, Farmington, CT (US)
Filed on Jan. 17, 2020, as Appl. No. 16/746,432.
Prior Publication US 2021/0222879 A1, Jul. 22, 2021
Int. Cl. F23R 3/00 (2006.01)
CPC F23R 3/002 (2013.01) [F23R 2900/03041 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A combustor for a gas turbine engine, the combustor comprising:
a combustion chamber defined between an inner shell and an outer shell;
a bulkhead extending between the inner shell and the outer shell; and
a liner panel mounted to one of the inner shell and the outer shell aft of the bulkhead, the liner panel extending axially between a forward end and an aft end, the forward end forming a leading edge of the liner panel and the aft end forming a trailing edge of the liner panel, the liner panel comprising:
a first section comprising a first plurality of effusion holes extending through the liner panel between an inner surface and an outer surface, a first portion of the first plurality of effusion holes extending in a substantially circumferential direction, a second portion of the first plurality of effusion holes, disposed at the leading edge and forward of the first portion, transitioning from the substantially circumferential direction toward a substantially forward direction, from the outer surface to the inner surface, as a first axial distance from the first portion increases, the second portion extending axially from the leading edge to the first portion, a third portion of the first plurality of effusion holes, disposed aft of the first portion, each of the effusion holes of the third portion transitioning from the substantially circumferential direction to a substantially aft direction, from the outer surface to the inner surface, as a second axial distance from the first portion increases, the third portion extending axially from the first portion to the trailing edge; and
a second section comprising a second plurality of effusion holes extending through the liner panel between the inner surface and the outer surface, the second plurality of effusion holes having a greater density of effusion holes than the first plurality of effusion holes;
wherein the effusion holes of the first plurality of effusion holes are oriented through the liner panel at a first angle relative to the inner surface of the liner panel and the effusion holes of the second plurality of effusion holes are oriented through the liner panel at a second angle relative to the inner surface of the liner panel, the second angle different than the first angle.