Abstract: A gas turbine engine including a core having a compressor section fluidly connected to a combustor via a primary flowpath and a turbine section connected to the combustor via the core flow path. An assembly is disposed within the gas turbine engine and includes a first part connected to a second part via a radial stack joint. The first part includes a radially inward facing surface contacting a corresponding radially outward facing surface of the second part. A fastener protrudes through the first part and the second part and is configured to maintain the relative positions of the first part and the second part. A channel is disposed on at least one of the radially inward facing surfaces and is positioned between the fastener and a circumferential edge of the first part. The channel is connected to at least one cooling air source.

Abstract: A compressor for a gas turbine engine includes a plurality of rotating wheel assemblies, a plurality of static vane assemblies, and a case extending around the rotating wheel assemblies and static vane assemblies. The static vane assemblies include an inner band, an outer band, and a plurality of vanes extending between the inner and outer bands.

Abstract: An implantable and extractable sensor is used for monitoring blood flow and vessel characteristics within a patient. The sensor includes a structurally supportive shuttle that has an angularly offset shelf. A transducer is mounted to this shelf and offset at the same angle so as to utilizes the Doppler effect. Silicone is injection molded around the assembly to provide a housing having a plurality of cutouts that expose portions of release wires running through the housing. The sensor is attached to the vessel by suturing around the exposed portions of the release wires. When the wires are retracted, the sensor can be extracted from the patient without having to reopen the surgical wound. The shuttle provides a consistent location to mount a transducer and also provides the structural support for the silicone housing.