Abstract:
An article includes a body portion made of a metal and configured for use in a gas turbine engine, a sensing feature monolithically formed with the body portion, and an interior passage connected to the sensing feature and passing through the body portion. An article with integrated sensing features may be made additive manufacturing, resulting in a structure having internal passageways connecting an aperture at one surface of the monolithic article to a second aperture at another surface of the monolithic article at the opposite end of the internal passageway.
Abstract:
A vane arm assembly (100) for a gas turbine engine (20) is provided including: a vane arm (102) having a first end (106), a second end (110) opposite the first end, and an aperture (116) proximate the second end, the aperture being defined by an aperture wall (142); a vane stem (108) extending through the aperture of the vane arm; a mechanical fastener (112) retaining a position of the vane arm in the longitudinal direction of the vane stem; and an impedance clip (114) partially enclosing a portion of the second end of the vane arm to provide redundant position retention of the vane arm in the longitudinal direction of the vane stem. A corresponding gas turbine engine (20) is also provided comprising a compressor section (24); a combustor section (26); a turbine section (28); and such a vane arm assembly (100) operatively coupled to an actuator ring and to at least one adjustable guide vane in the compressor section.
Abstract:
An article includes a body portion made of a metal and configured for use in a gas turbine engine, a sensing feature monolithically formed with the body portion, and an interior passage connected to the sensing feature and passing through the body portion. An article with integrated sensing features may be made additive manufacturing, resulting in a structure having internal passageways connecting an aperture at one surface of the monolithic article to a second aperture at another surface of the monolithic article at the opposite end of the internal passageway.
Abstract:
Integrally bladed rotors (IBRs) are described. The IBRs include a central hub (306;506;606), an outer rim (302;502;602) defining an outer circumference of the central hub, the outer rim defining a plurality of platforms, a plurality of circumferentially distributed blades (304;504;604), wherein a blade extends from each of the plurality of platforms, a rotor slot (308;508) arranged between two adjacent blades, wherein the rotor slot is defined by a cut within the outer rim, and a rotor slot insert (520;612) installed within the rotor slot, the rotor slot insert sized and shaped to fit within the rotor slot and prevent air leakage from a first side (608) of the central hub to a second side (610) of the central hub through the rotor slot during operation of the integrally bladed rotor.
Abstract:
A vane arm assembly (100) for a gas turbine engine (20) is provided including: a vane arm (102) having a first end (106), a second end (110) opposite the first end, and an aperture (116) proximate the second end, the aperture being defined by an aperture wall (142); a vane stem (108) extending through the aperture of the vane arm; a mechanical fastener (112) retaining a position of the vane arm in the longitudinal direction of the vane stem; and an impedance clip (114) partially enclosing a portion of the second end of the vane arm to provide redundant position retention of the vane arm in the longitudinal direction of the vane stem. A corresponding gas turbine engine (20) is also provided comprising a compressor section (24); a combustor section (26); a turbine section (28); and such a vane arm assembly (100) operatively coupled to an actuator ring and to at least one adjustable guide vane in the compressor section.
Abstract:
A variable vane actuation system (62) of a gas turbine engine (20) is provided. The variable vane actuation system (62) including: a variable vane (72); a vane stem (68) operably associated with the variable vane (72), wherein the variable vane (72) is configured to rotate with the vane stem (68); a vane arm (64) having vane stem end (88) and a vane pin end (76) opposite the vane stem end (88), the vane arm (64) being operably connected to the vane stem (68) at the vane stem end (88); and a rotational variable differential transformer (100) operably connected to the vane stem (68), the rotational variable differential transformer (100) configured to detect an amount of rotation of the vane stem (68).
Abstract:
A vane arm assembly (100) for a gas turbine engine (20). The vane arm assembly includes a vane arm (102) defining an aperture at an end thereof with an aperture wall. The vane arm assembly also includes a vane stem (108) extending through the aperture of the vane arm. The vane arm assembly further includes a mechanical fastener (112) retaining a position of the vane arm in the longitudinal direction of the vane stem. The vane arm assembly yet further includes an impedance ring (114) disposed within the aperture of the vane arm and within an impedance ring groove (140) defined by the vane stem to provide redundant position retention of the vane arm in the longitudinal direction of the vane stem.
Abstract:
A rotor blade (120) for a gas turbine engine includes a blade extending from a root (110) and a contoured tip portion at a first end of the blade. The first end is opposite the root. The contoured tip portion includes a first sloped region (130) and a second sloped region (140). The second sloped region is steeper than the first sloped region, relative to a platform (102). A method for operating a compressor of the gas turbine engine comprises generating a sculped pocket in the shroud during a rub event including a rear facing flowpath step and a forward facing flowpath bend at a tip clearance.