Abstract:
A combustor assembly (14) for a turbine engine includes an aft open end (24) that communicates gas flow to a turbine assembly (18). The combustor assembly (14) includes a liner assembly (15) that terminates at a first fixed vane (18). A portion of the liner assembly extends an axial distance (37) into the first fixed vane portion (18). An inner surface (42) of the liner assembly (15) corresponds with inner surfaces (45) of the fixed vane portion (18) to provide a smooth transition from the inner surfaces (42) of the combustor assembly (14) to the turbine assembly (18).
Abstract:
A heatshielded article includes a support 18 and at least one heatshield 20 secured adjacent to the support. The heatshield includes a shield portion 28 spaced from the support. The shield portion includes a hot side 30 and an uncoated cold side 32. A projection projects from an origin 36 at the shield portion to a terminus 38 remote from the shield portion. The terminus includes a protective coating 64 along at least a portion of its length.
Abstract:
A gas turbine engine combustor (20) has inboard and outboard walls (32,134). A forward bulkhead (36) extends between the walls and cooperates therewith to define a combustor interior volume. In longitudinal section, a first portion (54) of the combustor interior volume converges from fore to aft and a second portion (56), aft of the first portion (54) converges from fore to aft more gradually than the first portion (54).
Abstract:
A combustor for a turbine engine includes an outer liner (34) having a row of circumferentially distributed outer combustion air holes and an inner liner (32) circumscribed by the outer liner (34) and having a row of circumferentially distributed inner combustion air holes. The inner and outer liners (32, 34) each include at least a major air hole (104) having a first hole size, an intermediate air hole (108) having a second hole size, and a minor air hole (106) having a third hole size. The first, second, and third hole sizes are all different from each other.
Abstract:
A catalyst conduit for a catalytic reactor (10) of a turbine combustor, the conduit comprising a tube (14) including an inlet (26) and an outlet (32), and a wall with an interior surface (34) and an exterior surface (36). The tube (14) contains a variation in its cross sectional area along at least a portion of its length to change a property of a fluid flowing adjacent the wall of the tube (14). An oxidation catalyst (44) is deposited on at least a portion of the tube (14).
Abstract:
A combustor liner assembly (10) includes an outer shell (14) made of a ceramic composite and an inner heat shell (16) that is supported within the outer shell (14). The inner heat shield (16) defines a surface that is exposed to combustion gases. The inner heat shield (16) is made of material that is compatible with the ceramic matrix composite and that provides favorable thermal gradient capability for a combustion chamber.
Abstract:
A combustor assembly (10) includes an inner and outer liner (16,18) defining a combustion chamber (22). The inner and outer liners (16,18) include a plurality of cooling holes (36) spaced a specified distance apart. The cooling holes (36) include first, second and third groups (44,46,48). The first group (44) of cooling holes (36) is the most densely spaced, followed by the second group (46) and then the third group (48). The first group (44) of cooling holes (36) begin upstream of a leading edge (50) of a large opening (50) and terminates downstream of the leading edge (50). The increased density of cooling holes (36) adjacent the large openings (38) provide increased cooling airflow in areas where cooling may be affected by local disturbances in cooling airflow.
Abstract:
A combustor heat shield panel (28) is secured relative to a combustor shell (22) so as to hold the panel exterior surface (34) spaced apart from and facing the shell interior surface (36) over major area of the panel exterior surface. A gap (80) is formed between the heat shield exterior surface (34) and shell interior surface (36) along at least a major portion of the perimeter of the heat shield panel (28).
Abstract:
A combustor 10 for a gas turbine engine is provided which includes a plurality of liner segments 12 and a support shell 14. The support shell 14 includes an interior 16 and an exterior 18 surface, a plurality of mounting holes 20, and a plurality of impingement coolant holes 22 extending through the support shell 14. Each liner segment 12 includes a panel 24 and a plurality of mounting studs 32. The panel 24 includes a face surface 34 and a back surface 36, and a plurality of normal or inclined coolant holes 38 extending therethrough. The back surface 36 of the panel 24 has a surface profile for improving the heat transfer properties of a liner segment without substantial increase in pressure drop across the combustor.