Abstract:
A system for modulating turbine blade tip clearance is provided. The system may comprise an actuation control system having at least one actuator configured to modulate turbine blade tip clearance between a turbine blade tip and a blade outer air seal (BOAS). Each actuator may be coupled to the BOAS. Each actuator may comprise a solid-state motion amplification device such as a flextensional actuator. The actuators may be configured to move the BOAS in a radial direction from a first position to a second position to control tip clearance.
Abstract:
A system for modulating turbine blade tip clearance is provided. The system may comprise an actuation control system having at least one actuator configured to modulate turbine blade tip clearance. Each actuator may comprise a solid-state motion amplification device such as a flextensional actuator. Each actuator may be in operable communication with a blade outer air seal (BOAS) segment or a BOAS mounting block. The actuators may be configured to move the BOAS segment and/or the BOAS mounting block in a radial direction from a first position to a second position to control tip clearance.
Abstract:
An auxiliary lubricant comprising a composition, the comprising intermediate molecular weight surfactant-functionalized nanoparticles dispersed in a base oil.
Abstract:
A method of improving the aerodynamic performance of an inlet section of a nacelle assembly of a gas turbine engine, according to an exemplary aspect of the present disclosure includes, among other things, (a) sensing an operability condition, (b) adjusting a leading edge of the inlet section in response to the step (a), and (c) adjusting a thickness of the inlet section in response to the step (a).
Abstract:
A gas turbine engine includes a plurality of blades circumferentially spaced from each other. A plurality of rings are spaced radially outward from the plurality of blade. At least one actuator is in mechanical communication with the plurality of rings for moving the plurality of rings in an axial direction to create an axial gap adjacent at least one of the plurality of rings.
Abstract:
A bearing assembly monitoring system includes a bearing assembly supporting rotation of a rotating member. The bearing assembly includes a fixed portion and rotatable portion. A piezoelectric element is mounted to the fixed portion and generates an electric signal in response to a vibration of the fixed portion. A first transceiver is electrically coupled to the piezoelectric element to receive the electrical signal generated by the piezoelectric element and generate a signal indicative of the vibration of the fixed portion. A gas turbine engine bearing monitoring system and a method are also disclosed.
Abstract:
An optical in-situ system for a gas turbine engine blade inspection comprises a camera configured to capture images of a forward surface of at least one gas turbine engine blade; and a processor coupled to the camera, the processor configured to determine damage to the at least one gas turbine engine blade based on image analytics.
Abstract:
An auxiliary lubricant comprising a composition, the comprising intermediate molecular weight surfactant-functionalized nanoparticles dispersed in a base oil.
Abstract:
A rotor of an electric machine includes a rotor core having a plurality of axially-stacked rotor laminations, and a plurality of permanent magnets. The plurality of permanent magnets are first permanent magnets secured at the core outer circumferential surface of the rotor core and are made of a first permanent magnet material with a first magnetic orientation. The plurality of permanent magnets are secured to the rotor core via a plurality of mechanical interface joints defined by at least one first mechanical interface feature having a permanent magnet channel with a magnet channel surface, located inside the permanent magnet and at least one second mechanical interface feature having a core channel with a core channel surface located inside of the rotor core. At least one complimentary mechanical interface member is inserted in the magnet channel and the core channel, having surfaces complimentary to the magnet channel and the core channel.
Abstract:
An assembly for pivoting a flap according to an exemplary aspect of the present disclosure includes, among other things, a structure is mounted at least partially around an axis. The structure is attached to a pivotable flap arranged to define a nozzle area. A cable passes through an orifice defined by the flap. An actuator system is operable to mechanically retract the cable therein to lessen the nozzle area and mechanically extend the cable to enable the flow to increase the nozzle area. The actuator system is engaged with the cable. A segment of the cable, opposite the actuator system, is attached to a fixed structure. A method of providing a variable fan exit area is also disclosed.