Abstract:
A gas turbine engine (20;100) may comprise a first rotor (206) with a primary flowpath (201) along an outer diameter of the first rotor (206). A secondary flowpath (202) may be radially inward from the primary flowpath (201). The secondary flowpath (202) may pass through an opening (208) through the first rotor (206). A blade (252) may be disposed on a distal end of the first rotor (206). The blade (252) may extend into the primary flowpath (201). A bleed tube (204) may be in a wall of the primary flowpath (201) and forward of the blade (252). The bleed tube (204) may extend radially inward from the primary flowpath (201). The bleed tube (204) may fluidly connect to the opening (208) through the first rotor (206). A plenum (210) may be aft of the blade (252) and radially inward from the primary flowpath (201). The plenum (210) may be fluidly connected to the opening (208) through the first rotor (206). A second rotor (216) may be aft of the plenum (210).
Abstract:
A turbine injection system (148) for a gas turbine engine (20) includes a first end operable to receive air from a heat exchanger (140), a second end operable to distribute mixed cooling air to a turbine stage, an opening (136) downstream of said first end and a mixing plenum (152) downstream of said first end and said opening (136). The opening (136) provides a direct fluid pathway into said turbine injection system (148) from the combustor (56) of the engine (20).
Abstract:
A gas turbine engine includes a shaft defining an axis of rotation. An inner rotor directly drives the shaft and includes an inner set of blades. An outer rotor has an outer set of blades interspersed with the inner set of blades. The outer rotor is configured to rotate in an opposite direction about the axis of rotation from the inner rotor. A gear system couples the outer rotor to the shaft and is configured to rotate the inner set of blades at a lower speed than the outer set of blades.
Abstract:
A gas turbine engine includes a shaft defining an axis of rotation. An outer turbine rotor directly drives the shaft and includes an outer set of blades. An inner turbine rotor has an inner set of blades interspersed with the outer set of blades. The inner turbine rotor is configured to rotate in an opposite direction about the axis of rotation from the outer turbine rotor. A splitter gear system couples the inner turbine rotor to the shaft and is configured to rotate the inner set of blades at a faster speed than the outer set of blades.
Abstract:
A gas turbine engine includes a core housing providing a core flowpath. A shaft supports a compressor section arranged within the core flowpath. First and second bearings support the shaft relative to the core housing and are arranged radially inward of and axially overlapping with the compressor section.
Abstract:
A gas turbine engine (20) includes a very high speed low pressure turbine (46) such that a quantity defined by the exit area (401) of the low pressure turbine (46) multiplied by the square of the low pressure turbine rotational speed compared to the same parameters for the high pressure turbine (54) is at a ratio between about 0.5 and about 1.5. The high pressure turbine (54) is supported by a bearing (142) positioned at a point where the first shaft (32) connects to a hub (500) carrying turbine rotors associated with the second turbine section (54).
Abstract:
A seal segment (102) for a gas turbine engine (20) includes a first axial span (134) that extends between a first radial span (130) and a second radial span (132). A second axial span (136) extends between the first radial span (130) and the second radial span (132), the first radial span (130), the second radial span (132), the first axial span (134) and the second axial span (136) form a torque box. A plurality of seal segments (102) may be located between first and second rotor disks (68, 70).