Abstract: A system for controlling blade clearances within a gas turbine engine includes a rotor disk and a rotor blade coupled to the rotor disk. Additionally, the system includes an outer turbine component positioned outward of the rotor blade such that a clearance is defined between the rotor blade and the outer turbine component. Furthermore, the system includes a heat exchanger configured to receive a flow of cooling air bled from the gas turbine engine and transfer heat from the received flow of the cooling air to a flow of coolant to generate cooled cooling air. Moreover, the system includes a valve configured to control the flow of the coolant to the heat exchanger. In this respect, the cooled cooling air is supplied to at least one of the rotor disk or the rotor blade to adjust the clearance between the rotor blade and the outer turbine component.

Abstract: A passive flow modulation device for a machine defining an axial direction and a radial direction, the passive flow modulation device including: a first ring with a first coefficient of thermal expansion; a second ring disposed coaxially with the first ring and positioned at least partially inward of the first ring along the radial direction, spaced from the first ring along the axial direction, or both, the first ring, the second ring, or both defining at least in part one or more passages, the second ring with a second coefficient of thermal expansion that is less than the first coefficient of thermal expansion to passively modulate a size of the one or more passages during operation.

Abstract: A combustor assembly for a gas turbine engine includes a dome having a forward surface and an inner surface. The forward surface and the inner surface of the dome at least partially define a slot. The combustor assembly also includes a liner at least partially defining a combustion chamber and extending between an aft end and a forward end. The forward end of the liner is positioned within the slot of the dome. The forward end of the liner includes an axial interface surface and a radial interface surface. The axial interface surface defines a radial gap with the inner surface of the dome and the radial interface surface defines an axial gap with the forward surface of the dome. At least one of the radial gap or the axial gap is less than about 0.150 inches during operating conditions of the combustor assembly to prevent an undesirable airflow.

Abstract: A combustor assembly for a gas turbine engine includes a dome having a forward surface and an inner surface. The forward surface and the inner surface of the dome at least partially define a slot. The combustor assembly also includes a liner at least partially defining a combustion chamber and extending between an aft end and a forward end. The forward end of the liner is positioned within the slot of the dome. The forward end of the liner includes an axial interface surface and a radial interface surface. The axial interface surface defines a radial gap with the inner surface of the dome and the radial interface surface defines an axial gap with the forward surface of the dome. At least one of the radial gap or the axial gap is less than about 0.150 inches during operating conditions of the combustor assembly to prevent an undesirable airflow.

Abstract: A combustor assembly for a gas turbine engine includes a dome having a forward surface and an inner surface. The forward surface and the inner surface of the dome at least partially define a slot. The combustor assembly also includes a liner at least partially defining a combustion chamber and extending between an aft end and a forward end. The forward end of the liner is positioned within the slot of the dome. The forward end of the liner includes an axial interface surface and a radial interface surface. The axial interface surface defines a radial gap with the inner surface of the dome and the radial interface surface defines an axial gap with the forward surface of the dome. At least one of the radial gap or the axial gap is less than about 0.150 inches during operating conditions of the combustor assembly to prevent an undesirable airflow.

Abstract: Components and methods for forming components are provided. For example, a method for forming a component includes laying up a plurality of plies to form a component preform that defines an axis of symmetry and a circumferential direction. Laying up the plurality of plies includes overlapping ends of the plurality of plies to define overlap regions and offsetting the overlap regions along the circumferential direction such that any radial line drawn from the axis of symmetry through the plies passes through only one overlap region. In another embodiment, a component includes a body that is symmetric about an axis of symmetry and that defines a circumferential direction and a radial direction. The body is formed from a plurality of plies and has a substantially uniform thickness. Ends of the plurality of plies are overlapped to define a plurality of overlap regions, which are offset along the circumferential direction.

Abstract: Systems, devices and/or methods include communication of information, such as real-time rich media (e.g., video and audio) to, from and/or between a mobile first responder, such as remote public safety field personnel for public safety applications. Sensor data may be captured, stored, or transmitted and disseminated in real-time or on a schedule from field officers or their vehicles, based on one or more defined rules. In some examples, communication priority may be determined in response to detecting one or more events at a location of a mobile first responder.

Abstract: A combustor assembly for a gas turbine engine includes a dome having a forward surface and an inner surface. The forward surface and the inner surface of the dome at least partially define a slot. The combustor assembly also includes a liner at least partially defining a combustion chamber and extending between an aft end and a forward end. The forward end of the liner is positioned within the slot of the dome. The forward end of the liner includes an axial interface surface and a radial interface surface. The axial interface surface defines a radial gap with the inner surface of the dome and the radial interface surface defines an axial gap with the forward surface of the dome. At least one of the radial gap or the axial gap is less than about 0.150 inches during operating conditions of the combustor assembly to prevent an undesirable airflow.

Abstract: Components and methods for forming components are provided. For example, a method for forming a component includes laying up a plurality of plies to form a component preform that defines an axis of symmetry and a circumferential direction. Laying up the plurality of plies includes overlapping ends of the plurality of plies to define overlap regions and offsetting the overlap regions along the circumferential direction such that any radial line drawn from the axis of symmetry through the plies passes through only one overlap region. In another embodiment, a component includes a body that is symmetric about an axis of symmetry and that defines a circumferential direction and a radial direction. The body is formed from a plurality of plies and has a substantially uniform thickness. Ends of the plurality of plies are overlapped to define a plurality of overlap regions, which are offset along the circumferential direction.

Abstract: Systems, devices and/or methods include communication of information, such as real-time rich media (e.g., video and audio) to, from and/or between a mobile first responder, such as remote public safety field personnel for public safety applications. Sensor data may be captured, stored, or transmitted and disseminated in real-time or on a schedule from field officers or their vehicles, based on one or more defined rules. In some examples, communication priority may be determined in response to detecting one or more events at a location of a mobile first responder.

Abstract: Systems, devices and/or methods include communication of information, such as real-time rich media (e.g., video and audio) to, from and/or between a mobile first responder, such as remote public safety field personnel for public safety applications. Sensor data may be captured, stored, or transmitted and disseminated in real-time or on a schedule from field officers or their vehicles, based on one or more defined rules. In some examples, communication priority may be determined in response to detecting one or more events at a location of a mobile first responder.

Abstract: Systems, devices and/or methods include communication of information, such as real-time rich media (e.g., video and audio) to, from and/or between a mobile first responder, such as remote public safety field personnel for public safety applications. Sensor data may be captured, stored, or transmitted and disseminated in real-time or on a schedule from field officers or their vehicles, based on one or more defined rules. In some examples, communication priority may be determined in response to detecting one or more events at a location of a mobile first responder.

Abstract: Systems, devices and/or methods include communication of information, such as real-time rich media (e.g., video and audio) to, from and/or between a mobile first responder, such as remote public safety field personnel for public safety applications. A mobile device/system may capture, store and/or transmit sensor data of mobile sensors associated with the mobile device/system. In some examples, a field officer may set one or more rules via a user interface of a mobile system/device. A wireless communication may be automatically established in response to the sensor data and the one or more rules.

Abstract: A method of protecting luggage from tampering includes steps of receiving a piece of luggage at a baggage check-in station (1302), and encoding passenger and routing information at the baggage check-in station onto an identification tag (1304). The identification tag is attached to the piece of luggage (1306). The piece of luggage is placed on a baggage conveyor and conveyed to a security inspection station inside a secure area that excludes all unauthorized s personnel (1308). The piece of luggage is conveyed on the baggage conveyor to a scanning station to detect and decode the passenger and routing information on the identification tag (1310). The piece of luggage is conveyed on the baggage conveyor to a wrapping station (1312). When an identification tag is detected, the method continues from step (1316), otherwise from step (1322). When the identification tag indicates that the piece of luggage is to be wrapped, the method continues from step (1320), otherwise from step (1322).