Abstract:
A method of fabricating an airfoil includes the steps of fabricating a first core including a first plurality of ribs defining a first plurality of passages of a completed airfoil, and fabricating as second core including a second plurality of ribs defining a second plurality of passages of the completed airfoil. The second plurality of ribs includes a plurality of standoffs. The plurality of standoffs set a spacing between the first plurality of ribs and the second plurality of ribs to define a spacing between the first plurality of channels and the second plurality of channels of the completed airfoil. The airfoil is then molded about the core assembly. Once completed, the core assembly is removed to provide a completed airfoil incorporating multiple microcircuits with a desired stability and structural integrity.
Abstract:
A component for a gas turbine engine according to an exemplary aspect of the present disclosure includes, among other things, a platform that axially extends between a leading edge and a trailing edge, circumferentially extends between a first mate face and a second mate face, and includes a gas path surface and a non-gas path surface. The component defines at least one cavity that extends at least partially inside of the component. A first plurality of cooling holes extends from the at least one cavity to at least one of the first mate face and the second mate face and a second plurality of cooling holes extends from either the at least one cavity or the non-gas path surface to the gas path surface.
Abstract:
A turbine blade for a gas turbine engine includes an airfoil that extends in a first radial direction from a platform. A root extends from the platform in a second radial direction and has opposing lateral sides that provide a firtree-shaped contour. The contour includes first, second and third lobes on each of the lateral sides and that tapers relative to the radial direction away from the platform. The first, second and third lobes each provide contact surfaces arranged at about 45° relative to the radial direction. A contact plane on each lateral side at an angle of about 11° relative to the radial direction defining a contact point on each of the contact surfaces. The first, second and third lobes each include first, second and third grooves that are substantially aligned with one another along an offset plane spaced a uniform offset distance from the contact plane.
Abstract:
A gas turbine engine component comprises a shroud, a U-channel, an internal cooling air passage and a U-channel cooling hole. The shroud comprises a forward face, an aft face, a first side face and a second side face. The U-channel is disposed in the aft face of the shroud. A gas path surface connects the forward face, aft face, first side face and second side face. A cooled surface connects the forward face, aft face, first side face and second side face opposite the gas path face. The internal cooling air passage extends through the shroud. The U-channel cooling hole extends into the first side face of the shroud adjacent the U-channel to intersect the internal cooling passage.
Abstract:
A brush seal plate (200; 250) may comprise a flat ring (202; 252) with bristles (204; 254) protruding from an inner diameter (203; 253) of the flat ring (202; 252). The brush seal plate (200; 250) may have a racetrack slot (208; 258) to allow the flat ring (202; 252) to move in a radial direction relative to a retention pin (210; 260). The bristles (204; 254) may protrude from the inner diameter (203; 253) of the flat ring (202; 252) at an angle. A slot (208; 258) may be formed through the flat ring (202; 252), and the slot (208; 258) may be angled. The flat ring (202; 252) may be circumferentially discontinuous. The flat ring (202; 252) may further comprise a retention opening (208; 258) configured to fix the flat ring (202; 252) in place relative to a retention pin (210; 260).
Abstract:
The invention is related to a turbine vane (66), which includes an outer platform (76) including a first side (82) spaced circumferentially apart from a second side (84), a forward rail (90) and an aft rail (92). The first side (82) includes a first gusset (96) extending between the forward rail(90) and the aft rail(92). The first gusset (96) comprises a curvilinear portion (104) which is defined by a first radius (106) beginning at the forward rail (90) that transitions via a straight portion (110) into an elliptical curve (108) toward the aft rail (92). The second side (84) comprises a second gusset (98) comprising a similarly shaped curvilinear surface (104). The second gusset (98) may have a thickness (102) being different of a thickness (100) of the first gusset (96). The gussets (96,98) maintain the orientation of the rails (90,92) against bending forces.
Abstract:
What is described is a transfer tube (200) for use with an airfoil of a gas turbine engine (20) coupled to a platform (110). The transfer tube (200) includes a main body (340) having a first end (304) defining an inlet (300) configured to receive a flow of fluid and a second end (306) defining an outlet (302) for the flow of fluid, the main body (340) having a curved section (312). The transfer tube (200) also includes a first mating face (324) coupled to the first end (304) of the main body (340). The transfer tube (200) also includes a second mating face (326) coupled to the second end (306) of the main body (340). At least one of the first mating face (324) or the second mating face (326) is configured to be coupled to a platform body (208) of the outer diameter platform (110B).
Abstract:
Non-contacting dynamic seals (200; 400) having wave springs (360; 460; 561-566) are disclosed herein. A non-contacting dynamic seal (200; 400) may have a shoe (310; 410; 510) coupled to an outer ring (210; 320; 420; 520) by an inner beam (330; 430; 530) and an outer beam (340; 440; 540). A wave spring (360; 460; 561-566) may be located between the inner beam (330; 430; 530) and the outer beam (340; 440; 540), between the shoe (310; 410; 510) and the inner beam (330; 430; 530), or between the outer beam (340; 440; 540) and the outer ring (210; 320; 420; 520). The wave spring (360; 460; 561-566) may damp vibrations in the inner beam (330; 430; 530) and the outer beam (340; 440; 540).