Abstract:
A heat shield assembly (100) for a gas turbine engine combustor is provided. The combustor (16) includes a domeplate (70) and at least one fuel injector (58) extending through an opening (80) in the domeplate. The heat shield assembly includes a heat shield (110) coupled against a downstream side of the domeplate, a threaded collar (124) extending upstream from the heatshield, the threaded collar received within the domeplate opening, and a retainer (112) coupled to the collar such that the domeplate is securely coupled between the heat shield and the retainer.
Abstract:
A combustor dome assembly for a gas turbine engine having a longitudinal centerline axis extending therethrough, including: an annular dome plate (20) having an inner portion (30), an outer portion (32), a forward surface (34) and a plurality of circumferentially spaced openings formed therein, wherein a radial section is defined between adjacent openings; an annular outer cowl (38) connected to the outer portion (32) of the dome plate (20); an annular inner cowl (44) connected to the inner portion (30) of the dome plate (20); and, a swirler (26) located between the forward surface (34) of the dome plate (20) and the inner and outer cowls (44,38) in substantial alignment with each of the openings (36) in the dome plate (20). Each swirler (26) further includes a forward portion (50) and an aft portion (52) and is retained by at least one tab member (54, 56) located upstream thereof so as to be movable in a radial and axial direction.
Abstract:
A combustor dome assembly for a gas turbine engine having a longitudinal centerline axis extending therethrough includes: an annular dome plate (20) having an inner portion (30), an outer portion (32), a forward surface, and a plurality of circumferentially spaced openings (36) formed therein, wherein a radial section defined between each of the openings (36) includes a cooling trough (35) formed therein; and, a free floating swirler (26) located upstream of the dome plate (20) in substantial alignment with each of the openings (36) in the dome plate (20), the swirler (26) including a forward portion (50) and an aft portion (52). The aft portion (52) of each swirler (26) is configured so as to permit air flow to the cooling trough (35) during operation of the gas turbine engine. In particular, the swirler aft portion (52) includes a substantially annular flange (74) extending adjacent to the forward surface of the dome plate (20), wherein opposing portions of a circumference for the flange (74) adjacent the radial sections of the dome plate (20) are substantially linear.
Abstract:
A combustor dome assembly for a gas turbine engine having a longitudinal centerline axis extending therethrough, including: an annular dome plate (20) having an inner portion (30), an outer portion (32), a forward surface (34) and a plurality of circumferentially spaced openings formed therein, wherein a radial section is defined between adjacent openings; an annular outer cowl (38) connected to the outer portion (32) of the dome plate (20); an annular inner cowl (44) connected to the inner portion (30) of the dome plate (20); and, a swirler (26) located between the forward surface (34) of the dome plate (20) and the inner and outer cowls (44,38) in substantial alignment with each of the openings (36) in the dome plate (20). Each swirler (26) further includes a forward portion (50) and an aft portion (52) and is retained by at least one tab member (54, 56) located upstream thereof so as to be movable in a radial and axial direction.
Abstract:
A two-stage fuel nozzle assembly (56) for a gas turbine engine. The primary combustion region (120) is centrally positioned and includes a fuel injector (122) that is surrounded by one or more swirl chambers (132, 160) to provide a fuel air mixture that is ignited to define a first stage combustion zone. A secondary combustion region is provided by an annular housing (168) that surrounds the primary combustion region (120) and it includes a secondary fuel injector (126) having a radially-outwardly-directed opening (172) and surrounded by an annular ring (128) that includes openings (194) for providing a swirl chamber for the secondary combustion region (124). Cooling air is directed angularly between the primary and secondary combustion zones to delay intermixing and thereby allow more complete combustion of the respective zones prior to their coalescing further downstream. The primary combustion region (120) is activated during idle and low engine power conditions, and both the primary (120) and secondary (124) combustion regions are activated during high engine power conditions.
Abstract:
A double annular combustor having concentrically disposed inner and outer annular combustors is provided with inner and outer domes (22,21). A centerbody (50) is disposed between the inner and outer domes (22,21) and is constructed of a plurality of closed cell segments (51). Each segment includes an upper face (52), a lower face (53), an upstream face (54) and a downstream end (55). The upper and lower faces include flanges (56,57) extending therefrom to form cavities (58,59), within which are cooling holes (60,61). Pins are also provided which extend between the upper and lower faces of the centerbody to augment the cooling and structural connection thereof.