摘要:
An arrangement (100) for delivering combustions gas from a plurality of combustors onto a first row of turbine blades along respective straight gas flow paths, including: a hoop structure (104) at a downstream end of the arrangement and defining at least part of an annular chamber (24); and a plurality of discrete ducts (102), each disposed between a respective combustor and the hoop structure (104). Each duct (102) is secured to the hoop structure (104) at a respective duct joint (116). The hoop structure (104) includes a quantity of hoop segments (105, 130, 132) that is less than a quantity of ducts (102).
摘要:
A ceramic matrix composite wall structure (20A) constructed of interlocking layers (22A, 24A) of woven material with integral cooling channels (28A, 32A). The CMC layer closest to the hot gas path (41) contains internal cooling tubes (26A, 30A) protruding into a ceramic insulating layer (40A). This construction provides a cooled CMC lamellate wall structure with an interlocking truss core.
摘要:
A turbine airfoil usable in a turbine engine with a cooling system and a compliant dual wall configuration configured to enable thermal expansion between inner and outer layers while eliminating stress formation in the outer layer is disclosed. The compliant dual wall configuration may be formed a dual wall formed from inner and outer layers separated by a support structure. The outer layer may be a compliant layer configured such that the outer layer may thermally expand and thereby reduce the stress within the outer layer. The outer layer may be formed from a nonplanar surface configured to thermally expand. In another embodiment, the outer layer may be planar and include a plurality of slots enabling unrestricted thermal expansion in a direction aligned with the outer layer.
摘要:
A cooled component wall (52) with a combustion gas (36) on one side (56) and a coolant gas (48) with higher pressure on the other side (58). The wall includes a cooling chamber (60) with an impingement cooling zone (62), a convective cooling zone (64), and a film cooling zone (66). Impingement holes (70) admit and direct jets (72) of coolant against the wall, thence the coolant passes among heat transfer elements such as channels (76) and fins (78) to the film cooling zone (66) where it passes through holes in the wall that direct a film of the coolant along the combustion side of the wall. The chamber may be oriented with the impingement zone (62) downstream and the film cooling zone (66) upstream, relative to the combustion gas flow (36). This provides two passes of the coolant (84, 79) in opposite directions over the respective opposite sides of the wall (56, 58).
摘要:
A method of making a combustion turbine component includes forming a metallic body by direct metal fabrication (DMF) to have at least one surface portion defining a first plurality of surface cooling features each having a first dimension and at least one second surface cooling feature on at least one of the first plurality of surface cooling features and having a second dimension less than said first dimension and less than 200 μm. Forming the metallic body by DMF may include forming a plurality of metallic combustion turbine subcomponent greenbodies by DMF and assembling the plurality of metallic combustion turbine subcomponent greenbodies together to form a metallic greenbody assembly. The metallic greenbody assembly may be sintered to thereby form the metallic body.
摘要:
A gusset (40A-G) between two CMC walls (26, 28) has fibers (23) oriented to provide anisotropic strengthening of the wall intersection (34). The fibers (23) may be oriented diagonally to oppose in tension a wall-spreading moment of the walls (26, 28) about the intersection (34). Interlocking features (46, 48, 52, 56, 58) may be provided on the gusset to improve load sharing between the gusset and the walls. The gusset may have one or more diagonal edges (50, 51) that contact matching edges of a slot (42, 42D, 43D) to oppose wall-spreading (M1) and wall-closing (M2) bending of the walls (26, 28). The gusset may be installed in the slot after preparing the gusset and the walls to different temperatures. Then the assembly may be final-fired to produce differential shrinkage that causes compression of the gusset or the wall intersection.
摘要:
A stem (34) extends from a second part (30) through a hole (28) in a first part (22). A groove (38) around the stem provides a non-threaded contact surface (42) for a ring element (44) around the stem. The ring element exerts an inward force against the non-threaded contact surface at an angle that creates axial tension (T) in the stem, pulling the second part against the first part. The ring element is formed of a material that shrinks relative to the stem by sintering. The ring element may include a split collet (44C) that fits partly into the groove, and a compression ring (44E) around the collet. The non-threaded contact surface and a mating distal surface (48) of the ring element may have conic geometries (64). After shrinkage, the ring element is locked onto the stem.
摘要:
A method of making a combustion turbine component includes forming a metallic body by direct metal fabrication (DMF) to have at least one surface portion defining a first plurality of surface cooling features each having a first dimension and at least one second surface cooling feature on at least one of the first plurality of surface cooling features and having a second dimension less than said first dimension and less than 200 μm. Forming the metallic body by DMF may include forming a plurality of metallic combustion turbine subcomponent greenbodies by DMF and assembling the plurality of metallic combustion turbine subcomponent greenbodies together to form a metallic greenbody assembly. The metallic greenbody assembly may be sintered to thereby form the metallic body.
摘要:
A ceramic matrix composite (CMC) airfoil assembled from a pressure side wall (42) and a suction side wall (52) joined by interlocking joints (18, 19) at the leading and trailing edges (22, 24) of the airfoil to produce a tapered thin trailing edge. The trailing edge (24) is thinner than a combined thicknesses of the airfoil walls (42, 52). One or both of the interlocking joints (18, 19) may be formed to allow only a single direction of assembly, as exemplified by a dovetail joint. Each joint (18, 19) includes keys (44F, 54F, 56F, 46F) on one side and respective keyways (44K, 54K, 56K, 46K) on the other side. Each keyway may have a ramp (45) that eliminates indents in the airfoil outer surface that would otherwise result from the joint.
摘要:
A turbine airfoil usable in a turbine engine with a cooling system and a compliant dual wall configuration configured to enable thermal expansion between inner and outer layers while eliminating stress formation is disclosed. The compliant dual wall configuration may be formed a dual wall formed from inner and outer layers separated by a compliant structure. The compliant structure may be configured such that the outer layer may thermally expand without limitation by the inner layer. The compliant structure may be formed from a plurality of pedestals positioned generally parallel with each other. The pedestals may include a first foot attached to a first end of the pedestal and extending in a first direction aligned with the outer layer, and may include a second foot attached to a second end of the pedestal and extending in a second direction aligned with the inner layer.