Abstract:
Turbine and compressor casing abradable component embodiments for turbine engines, with composite grooves and vertically projecting alternating rows of first and second height ridges in planform patterns, to reduce, redirect and/or block blade tip airflow leakage downstream into the grooves rather than from turbine blade airfoil high to low pressure sides. The first ridges have a first ridge height greater than that of the second ridges. These ridge or rib embodiments have first lower and second upper wear zones. The lower zone, at and below the second ridge height, optimizes engine airflow characteristics, while the upper zone, between tips of the second and first ridges, is optimized to minimize blade tip gap and wear by being more easily abradable than the lower zone.
Abstract:
An erosion resistant and hydrophobic article includes a core that has a first hardness and a surface on the core. The surface includes a plurality of geometric features that have a second, greater hardness. The geometric features define a surface porosity by area percent and a corresponding surface solidity by area percent. The surface includes a ratio of the surface solidity divided by the surface porosity that is 1.8 or greater. The geometric features and the ratio establish the surface to be hydrophobic, and the second, greater hardness and the ratio establish an erosion rate of the surface that is equal to or less than an erosion rate of the core under identical erosion conditions.
Abstract:
Die Erfindung betrifft eine Turbinenschaufel (10), mit mehreren Rippen (18), welche aufeinanderfolgend in einem Kühlkanal (14) angeordnet sind, der sich längs einer Strömungseintrittskante (12) erstreckt, und bei der mit jeweils zwei Rippen (18) ein Rippen-Paar (24) gebildet ist, dessen Rippen (18) in Schlittschuhschritt-Form angeordnet sind.
Abstract:
Processes are described herein which 3D print a ceramic fiber composite (24, 48) in a printed pattern (308) on a ceramic matrix composite (CMC) component (300) in order to define a plurality of channels (312) between adjacently deposited segments (314) of the ceramic fiber composite (24, 48). A thermal barrier coating (TBC) (318) is deposited within the channels (312), and optionally over the segments (314), to mechanically interlock the TBC (318) to the CMC component (300), thereby improving the adhesion of the TBC (318) to the component (300) and the high temperature performance of the component (300).
Abstract:
The invention relates to a blade (13; 14) for a turbine (10) which has at least one channel (22) that can be impinged with a coolant fluid. Several turbulators (23) which improve the heat exchange between the wall (19; 20) and the coolant fluid are provided on at least one wall (19; 20) of the channel (22). In addition, the turbulators (23) reinforce the wall (19; 20) and converge. As a result of said reinforcement, the thickness (d) of the wall (19; 20) in the area between the turbulators (23) can be reduced.
Abstract:
There is provided a component (100) a ceramic matrix composite portion (58) having a three dimensional surface (68). The ceramic matrix composite portion (58) further includes a ceramic matrix reinforced with a three-dimensional ceramic fiber material (83). In addition, the component (100) includes a metal portion (60) comprising a three dimensional surface (72) that interfaces with the three dimensional surface (68) of the ceramic matrix composite portion (58) to enable thermal and mechanical load transfer between the ceramic matrix composite portion (58) and the metal portion (60).
Abstract:
A fan blade (134) includes a working region (148) having a leading edge (138) and a pressure side (136). A plurality of flow modification features (150-1 to 150-4) are positioned at the working region, including first and second flow modification features (150-1, 150-2, 150-3) each having a wedge shape with a pointed end (152) and a wider end (154), and located on the pressure side. A length of the first flow modification feature is less than a chord length of the fan blade, and the pointed end of the first flow modification feature is spaced from the leading edge. A length of the second flow modification feature is less than the chord length of the fan blade, and the pointed end of the second flow modification feature is spaced from the leading edge. The first and second flow modification features are spaced from each other to define a channel (156) therebetween.
Abstract:
A wall structure (32, 42, 68, 70, 80) with layers (A, B, C, D, E) of non-random voids (26A, 26B, 28B, 30B) that interconnect to form discretely defined tortuous passages between an interior (21) and an exterior surface (23) of the wall for transpiration cooling of the wall. A coolant flow (38) through the wall may be metered by restrictions in coolant outlets (31) and/or within the passages to minimize the coolant requirement. Pockets (44) may be formed on the exterior surface of the wall for thermal Insulation (46). The layers may be formed by lamination, additive manufacturing, or casting. Layer geometries include alternating layers (A, B, C) with different overlapping void patterns (42), 3-D lattice structures (70), and offset waffle structures (80).
Abstract:
A gas turbine engine component (10) with an aluminide coating (42) on at least a portion of an airflow surface (18) that includes a roughening agent (44) effective to provide a desired surface roughness and a deposition process for forming such aluminide coatings (42). A layer (40) including a binder (38) and the roughening agent (44) maybe applied to the superalloy substrate (46) of the component (10) and the aluminide coating (42) formed on the airflow surface portion by exposing the component (10) and layer (40) to an appropriate deposition environment. Suitable roughening agents include metal and ceramic particles (44) that are dispersed on the airflow surface portion before exposure to the deposition environment. The particles (44), which are substantially intact after the aluminide coating (42) is formed, are dispersed in an effective number to supply the desired surface roughness.